United States v. Durham , 902 F.3d 1180 ( 2018 )


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  •                                                                                FILED
    United States Court of Appeals
    PUBLISH                                Tenth Circuit
    UNITED STATES COURT OF APPEALS                      August 29, 2018
    Elisabeth A. Shumaker
    FOR THE TENTH CIRCUIT                          Clerk of Court
    _________________________________
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.                                                       No. 16-6075
    MATTHEW LANE DURHAM,
    Defendant - Appellant.
    _________________________________
    Appeal from the United States District Court
    for the Western District of Oklahoma
    (D.C. No. 5:14-CR-00231-R-1)
    _________________________________
    Stephen Jones (Ashley Morey with him on the brief), Jones, Otjen, Davis & Bloyd,
    Enid, Oklahoma, for Defendant - Appellant.
    Steven W. Creager, Assistant United States Attorney (David P. Petermann, Assistant
    United States Attorney, and Mark Yancey, United States Attorney, with him on the
    brief), Oklahoma City, Oklahoma, for Plaintiff - Appellee.
    _________________________________
    Before HARTZ, MATHESON, and MORITZ, Circuit Judges.
    _________________________________
    MATHESON, Circuit Judge.
    _________________________________
    TABLE OF CONTENTS
    I. BACKGROUND .......................................................................................... 2
    A. Factual Background ................................................................................ 2
    B. Procedural Background ........................................................................... 6
    II. DISCUSSION ............................................................................................. 8
    A. Issue One: Constitutionality of 18 U.S.C. § 2423(c) under the
    Foreign Commerce Clause ..................................................................... 8
    1. Section 2423(c) and Congress’s Efforts to Combat Sex Trafficking .... 9
    a. Provisions of the statutory scheme .................................................. 10
    b. Early efforts to combat sex trafficking ........................................... 12
    c. Legislative history leading to passage of § 2423(c) ........................ 14
    i. Enactment of § 2423(b) ............................................................... 14
    ii. Enactment of § 2423(c) .............................................................. 15
    2. The Commerce Clause ....................................................................... 18
    a. ICC case law ................................................................................... 19
    i. Channels ...................................................................................... 19
    ii. Instrumentalities ......................................................................... 20
    iii. Substantial effect ....................................................................... 20
    i
    b. FCC case law .................................................................................. 22
    3. Congressional Authority Broader Under the FCC than the ICC ......... 24
    a. History ............................................................................................ 25
    b. Text ................................................................................................ 26
    c. Purpose ........................................................................................... 28
    d. The dissent’s view .......................................................................... 29
    i. Japan Line and the scope of FCC power ..................................... 30
    ii. Sovereignty of other nations ....................................................... 32
    iii. Summary ................................................................................... 36
    4. The Lopez Categories in the Foreign Commerce Context ................... 36
    a. The ICC’s three categories as a starting point ................................. 37
    b. The substantial-effect category is applicable here .......................... 38
    c. Evolution of the third Lopez category ............................................. 38
    d. Adapting the third Lopez category to the FCC ................................ 42
    5. Constitutionality of § 2423(c) ............................................................ 43
    a. Section 2423(c)’s legislative history supports rational basis ........... 44
    b. Section 2423(c) is an essential part of a broader statutory scheme . 45
    c. Section 2423(c)’s jurisdictional element supports rational basis ..... 48
    d. Raich supports rational basis for § 2423(c)..................................... 48
    ii
    e. Rational basis standard ................................................................... 52
    6. Legal Landscape ................................................................................. 54
    7. Conclusion ......................................................................................... 56
    B. Issue Two: Brady Claim ....................................................................... 57
    1. Additional Procedural Background .................................................... 57
    a. Trial testimony................................................................................ 57
    b. Supplemental motion for new trial ................................................. 60
    2. Analysis ............................................................................................. 64
    a. Standard of Review ......................................................................... 64
    b. Legal Background .......................................................................... 64
    c. No prejudice for a Brady violation.................................................. 65
    C. Issue Three: Mr. Durham’s Statements about Child Pornography
    and Homosexuality ............................................................................... 67
    1. Standard of Review ............................................................................ 68
    2. Additional Factual Background .......................................................... 68
    a. Evidence about child pornography and homosexuality ................... 68
    b. District court rulings ....................................................................... 69
    3. Legal Background .............................................................................. 71
    a. Rule 404(b) ..................................................................................... 71
    iii
    b. Rules 401 and 402 .......................................................................... 71
    c. Rule 403 ......................................................................................... 71
    4. Analysis ............................................................................................. 72
    a. Rule 404(b) ..................................................................................... 72
    b. Rules 401 and 402 .......................................................................... 73
    c. Rule 403 ......................................................................................... 74
    D. Issue Four: Prosecutorial Misconduct .................................................. 75
    1. Standard of Review ............................................................................ 75
    2. Additional Factual Background .......................................................... 76
    a. The Government’s cross-examination of Mr. Durham .................... 76
    b. The Government’s closing argument .............................................. 77
    3. Additional Procedural Background .................................................... 77
    4. Legal Background .............................................................................. 78
    5. Analysis ............................................................................................. 79
    a. Preservation .................................................................................... 79
    i. Alleged misconduct during cross-examination of Mr. Durham .... 79
    ii. Alleged misconduct during closing argument ............................. 80
    b. Plain error—substantial rights ........................................................ 80
    i. Alleged misconduct during cross-examination of Mr. Durham .... 81
    iv
    ii. Alleged misconduct during closing argument ............................. 81
    E. Issue Five: Cellphone Videos Authentication ....................................... 83
    1. Standard of Review ............................................................................ 84
    2. Additional Background ...................................................................... 84
    a. Pre-Trial ......................................................................................... 84
    b. Trial ................................................................................................ 87
    3. Legal Background .............................................................................. 88
    4. Analysis ............................................................................................. 89
    F. Issue Six: Victims’ Medical Records .................................................... 90
    1. Standard of Review ............................................................................ 91
    2. Additional Background ...................................................................... 91
    3. Legal Background .............................................................................. 92
    a. Invited error .................................................................................... 92
    b. Authentication ................................................................................ 92
    c. The hearsay rule and pertinent exceptions ...................................... 92
    d. Unfair prejudice .............................................................................. 93
    4. Analysis ............................................................................................. 93
    G. Issue Seven: Substantive Reasonableness of Sentence ......................... 96
    1. Standard of Review ............................................................................ 96
    v
    2. Additional Factual Background .......................................................... 97
    3. Legal Background ............................................................................ 100
    4. Analysis ........................................................................................... 101
    H. Issue Eight: Cumulative Error ............................................................ 103
    III. CONCLUSION ...................................................................................... 105
    vi
    Matthew Durham appeals his convictions and sentence on four counts for illicit
    sex with minors in Kenya after travelling there from the United States. This opinion
    addresses the following eight issues presented for appellate review.
    1. Is 18 U.S.C. § 2423(c), the statute on which the convictions
    were based, unconstitutional on its face and as applied to Mr.
    Durham because it exceeds Congress’s power under the
    Foreign Commerce Clause in Article 1, Section 8, Clause 3 of
    the Constitution? We hold that § 2423(c) is constitutional
    because Congress could rationally conclude that travel abroad
    followed by illicit sex with a minor, in the aggregate,
    substantially affects foreign commerce.
    2. Did the district court err when it denied Mr. Durham’s
    supplemental motion for a new trial alleging that the
    Government suppressed exculpatory evidence in violation of
    Brady v. Maryland, 
    373 U.S. 83
    (1963)? We affirm because
    Mr. Durham has not shown that nondisclosure of the evidence
    prejudiced his case.
    3. Did the district court err under Federal Rules of Evidence
    401, 403, and 404(b) when it allowed admission of Mr.
    Durham’s statements about his struggles with child
    pornography and homosexuality? We affirm. The district
    court did not abuse its discretion in determining the evidence
    was intrinsic, relevant, and not unduly prejudicial.
    4. Did the district court err when it denied Mr. Durham’s motion
    for a new trial alleging that the Government made improper
    statements about his struggle with homosexuality during
    cross-examination of Mr. Durham and during closing
    argument? We affirm under plain error review because Mr.
    Durham cannot show that the prosecutor’s statements affected
    his substantial rights.
    5. Did the district court err in admitting cellphone video
    recordings because they were not properly authenticated? We
    affirm. The district court did not abuse its discretion because
    the Government presented sufficient foundation evidence for
    authentication.
    6. Did the district court err when it admitted the victims’ entire
    medical records? We affirm because Mr. Durham invited any
    error and because his arguments alleging lack of
    authentication, inadmissible hearsay, and unfair prejudice do
    not show that the district court erred in admitting the records.
    7. Did the district court abuse its discretion and impose a
    substantively unreasonable sentence when it sentenced Mr.
    Durham to 480 months in prison? We affirm because Mr.
    Durham cannot overcome the presumption that the district
    court reasonably weighed the sentencing factors under 18
    U.S.C. § 3553(a) or show that its sentencing decision exceeds
    the bounds of permissible choice.
    8. Should the convictions be reversed because the errors,
    considered cumulatively, deprived him of a fair trial? Mr.
    Durham cannot show that any errors that may be eligible for
    cumulative error review cumulatively affected his substantial
    rights.
    Exercising jurisdiction under 18 U.S.C. § 3742(a) and 28 U.S.C. § 1291, we
    therefore affirm Mr. Durham’s convictions and sentence.
    I. BACKGROUND
    A. Factual Background
    On May 1, 2014, Mr. Durham, then 19 years old, arrived in Kenya on his fourth
    Christian missionary trip there. ROA, Vol. 12 at 1818 (TT 1204); ROA, Vol. 10a at 25.1
    In Kenya, he volunteered at the Upendo Children’s Home (“Upendo”), where 33 children
    from impoverished backgrounds live. ROA, Vol. 12 at 695-97, 787 (TT 81-83, 173).
    Upendo Kids International, an Oklahoma non-profit founded and directed by Eunice
    Menja, operates Upendo. 
    Id. at 787,
    960 (TT 173, 346), Aplee. Br. at 3. Ms. Menja’s
    1
    “ROA” denotes “Record on Appeal.” “TT” denotes “Trial Transcript.”
    2
    sister, Josephine Wambugu,2 is the manager of Upendo. ROA, Vol. 12 at 695, 788 (TT
    81, 174).
    On his previous trips to Kenya, Mr. Durham had stayed with a host family, but on
    the fourth trip, he asked to stay at Upendo instead. 
    Id. at 1811
    (TT 1197). On June 12,
    2014, Ms. Wambugu entered one of the girls’ bedrooms and saw Mr. Durham lying on a
    bed with one of the girls. 
    Id. at 705,
    (TT 91). When Ms. Wambugu came into the room,
    Mr. Durham left quickly. 
    Id. at 705-06
    (TT 91-92). Ms. Wambugu then spoke to some
    of the girls, who said they had “been doing bad manners” with Mr. Durham. ROA, Vol.
    12 at 710-11 (TT 96-97). The children used “bad manners” to mean engaging in sexual
    acts. See 
    id. at 662
    (TT 48); 1412 (TT 798); 1443-44 (TT 829-30).
    On June 13, Ms. Menja, Ms. Wambugu, Jason Jeffries (another American
    volunteer at the home), and Tom Mutonga (a local supporter of Upendo) met with Mr.
    Durham at Upendo. 
    Id. at 817,
    825 (TT 203, 211). When he entered the meeting, Mr.
    Durham yelled, “You can fire me, fire me now.” 
    Id. at 825
    (TT 211). Ms. Menja
    accused him of hurting the girls and asked for his response. 
    Id. at 826
    (TT 212). Mr.
    Durham said he did not remember, and asked to speak to Ms. Wambugu alone. 
    Id. at 826
    -27 (TT 212-13).
    Once alone, he asked Ms. Wambugu to defend him, and she asked him whether he
    had done the acts reported by the girls. 
    Id. at 723
    (TT 109). He said, “Yes, I did it. Yes,
    I did.” 
    Id. at 723
    (TT 109). But when he went back to talk to the group, Mr. Durham
    2
    The trial transcript spells Ms. Wambugu’s first name as “Josphine,” but court
    records refer to her as “Josephine.” See ROA, Vol. 1 at 40. We therefore assume her
    name is properly spelled “Josephine.”
    3
    again said he could not remember assaulting the children. He added that he had been
    struggling with child pornography and homosexuality. 
    Id. at 724,
    828 (TT 110, 214).
    Ms. Menja told Mr. Durham she was going to take him to a different location, explaining
    that, for the safety of the children, she did not want him to stay at the children’s home.
    
    Id. at 829
    (TT 215). He spent the next three days at an empty house owned by Ms.
    Menja’s father-in-law. 
    Id. at 830
    (TT 216). One of the volunteers had taken Mr.
    Durham’s passport after hearing about the allegations. 
    Id. at 1052
    (TT 438).
    During his time away from Upendo, Mr. Durham sent his father text messages
    stating: “I don’t want to live anymore” and “I hate myself. I deserve to burn in hell.”
    ROA, Vol. 9 at 78 (Gov’t Exh. 29). He sent a text to Ms. Menja saying: “Tell all the kids
    how sorry i am, and i am praying for their forgiveness every hour.” 
    Id. at 18
    (Gov’t Exh.
    10) (errors in original).
    Mr. Durham’s great-uncle arranged for Mr. Durham to fly back to Oklahoma.
    ROA, Vol. 12 at 1682-83 (TT 1068-69). On June 17, before he flew out, Mr. Durham
    met with Ms. Menja, Ms. Wambugu, and Mr. Mutonga at the Seagull restaurant. 
    Id. at 855
    (TT 241). Ms. Menja video recorded some of the ensuing conversation in multiple
    videos on her cellphone (the “Seagull Confession Videos”). 
    Id. at 856
    (TT 242). Mr.
    Durham knew that he was being recorded and asked that the video be kept on. Gov’t
    Exh. 4 at 12:09. On the longest video, Ms. Menja asked Mr. Durham about the
    allegations. He responded that he had struggled with a “temptation to touch children and
    to be with other men.” Gov’t Exh. 4 at 1:55-2:01. When Ms. Menja started asking about
    4
    specific children who had accused him of abuse, Mr. Durham admitted to assaulting
    those children. See, e.g., 
    id. at 5:39-6:15.
    After Ms. Menja stopped recording the video, she said she could not listen any
    more, and Mr. Durham offered to write down his confession. ROA, Vol. 12 at 865 (TT
    251). He wrote detailed statements about how he abused or otherwise engaged in
    inappropriate behavior with over ten of the children. ROA, Vol. 9 at 8-16. The
    following relate to three of the four charges of conviction and each concerns a different
    victim:
     “I would take her to the bathroom at night and hold her down
    and rape her. This happened on several occasions. I also
    made her watch me do things to [another girl]. I told her
    never to tell anyone, and that I loved her.” ROA, Vol. 9 at 8
    (Gov’t Exh. 9).
     “I would take her to the bathroom and have her take off her
    clothes. I would touch myself and her. I don’t know how
    many times it occurred. Also, when we had our sleepovers
    Friday night, [she] always made a point to sleep by me. I
    would spoon with her until I woke up.” 
    Id. at 15
    (Gov’t Exh.
    9).
     “I took her to the bathroom and force[d] her to have sex with
    me. This happened on more than one occasion. I made her
    swear to never tell anyone . . . . Any time I try to read the
    bible or pray, this image comes to my [head].” 
    Id. at 16
                 (Gov’t Exh. 9).
    Ms. Wambugu next spoke to the Kenyan police, who told her they could not arrest
    Mr. Durham. ROA, Vol. 12 at 873-74 (TT 259-60). Ms. Menja returned Mr. Durham’s
    passport to him, and he flew out of Kenya the night of June 17. 
    Id. at 874-75
    (TT 260-
    61).
    5
    Ms. Menja took six victims to a doctor the next day, June 18. 
    Id. at 875
    (TT 261).
    Medical workers examined them and determined five out of six had perforated hymens.
    
    Id. at 1187-88
    (TT 574-75). Ms. Menja later reported what had happened to the U.S.
    Embassy. 
    Id. at 875
    (TT 261).
    B. Procedural Background
    Mr. Durham was arrested in the United States on July 18, 2014. ROA, Vol. 1 at
    77. A grand jury returned an original indictment on August 5, 2014, charging three
    counts. 
    Id. at 130-31.
    It later returned two superseding indictments. 
    Id. at 248,
    467.
    The second, the operative indictment, was returned in April 2015 and charged Mr.
    Durham with eight counts of interstate travel with intent to engage in a sexual act with a
    child, in violation of 18 U.S.C. § 2241(c), and eight counts of traveling in foreign
    commerce and engaging in illicit sexual conduct with a minor, in violation of 18 U.S.C. §
    2423(c). 
    Id. at 467-76.
    The indictment identified eight victims by their initials. 
    Id. Mr. Durham
    also was charged with one count of traveling in foreign commerce with intent to
    engage in illicit sexual conduct in violation of 18 U.S.C. § 2423(b).
    Trial was held between June 10, 2015, and June 18, 2015. Five of the eight
    alleged victims testified, including the victims associated with each of the four
    convictions. ROA, Vol. 12 at 658, 1406, 1426, 1440, 1458. Dr. Alawiya Abdulkadir
    Mohamed, who prepared some of the medical documentation in Kenya, also testified for
    the prosecution. 
    Id. at 1186-88
    (TT 572-74). Mr. Durham’s written and videotaped
    confessions and his text messages were admitted into evidence. 
    Id. at 737,
    857, 1248 (TT
    123, 243, 634).
    6
    Mr. Durham testified in his defense. ROA, Vol. 12 at 1792 (TT 1178). The
    defense also presented testimony from a professional counselor about forensic interviews
    with victims of sexual assault, 
    id. 1506, 1515
    (TT 892, 901), and from a sexual assault
    nurse examiner, Lisa Dunson, about the medical findings in the case, 
    id. at 1581
    (TT
    967). Mr. Durham’s mother, father, and great-uncle also testified in his defense. 
    Id. at 16
    38, 1721, 1759 (TT 1024, 1107, 1145).
    The jury found Mr. Durham guilty on seven counts of traveling in foreign
    commerce and engaging in illicit sexual conduct with a minor in violation of 18 U.S.C.
    § 2423(c). ROA, Vol. 3 at 193-94. It found him not guilty of the remaining counts. 
    Id. Mr. Durham
    moved for arrest of judgment, arguing that 18 U.S.C. § 2423(c) is
    unconstitutional. 
    Id. at 229.
    He also moved for acquittal and a new trial. 
    Id. at 277,
    305.
    Mr. Durham supplemented his motion for a new trial when he learned the prosecution
    had failed to disclose information favorable to the accused during trial. 
    Id. at 489.
    The district court denied the motions for arrest of judgment and a new trial. 
    Id. at 752,
    760, 776, 811. It granted acquittal on three of the § 2423(c) counts because the
    Government had not shown Mr. Durham engaged in “sexual conduct” as defined by the
    statute, but it denied acquittal on the other four counts. 
    Id. at 762-67,
    774-75.
    The final Presentence Investigation Report (“PSR”) calculated a recommended
    sentence of 1,440 months in prison under the United States Sentencing Guidelines (the
    “Guidelines”), based on Mr. Durham’s total offense level and criminal history category.
    ROA, Vol. 7 at 142. This represented the statutory maximum of 30 years for each count
    of conviction, running consecutively. 
    Id. at 142
    n.3. The district court sentenced Mr.
    7
    Durham to 480 months in prison, a sentence it characterized as a variance below the
    Guidelines range. ROA, Vol. 3 at 844; ROA, Vol. 7 at 477; ROA, Vol. 13 at 158.
    II. DISCUSSION
    Mr. Durham raises eight issues on appeal. As to each issue, we present the
    applicable standard of review and also provide additional factual, procedural, and
    legal background, as needed.
    A. Issue One: Constitutionality of 18 U.S.C. § 2423(c) under the
    Foreign Commerce Clause
    Mr. Durham challenges the constitutionality of 18 U.S.C. § 2423(c), arguing that
    Congress exceeded its authority under the Foreign Commerce Clause. See U.S. Const.
    art. I, § 8, cl. 3. Section 2423(c) makes it a crime for “[a]ny United States citizen or alien
    admitted for permanent residence [to] travel[] in foreign commerce . . . and engage[] in
    any illicit sexual conduct with another person.” 18 U.S.C. § 2423(c). “Illicit sexual
    conduct” includes any commercial or noncommercial sexual act with a person under the
    age of 18, 
    id. § 2423(f)(1)-(2),
    and the production of child pornography, 
    id. § 2423(f)(3).
    Mr. Durham was charged under § 2423(c) for traveling abroad and engaging in
    noncommercial sexual acts with minors. He argues that, because noncommercial illicit
    sexual activity abroad has no relation to foreign commerce, the statute is unconstitutional
    on its face and as applied to him and his conviction therefore cannot stand.3 We review
    3
    Mr. Durham brings both a facial and an as-applied challenge. See Aplt. Br.
    at 48. The Government contends he has waived his as-applied challenge, but even if
    this is so, we may resolve a facial challenge by conducting an as-applied analysis.
    We previously have said that “we need not and do not address [a] facial
    challenge” when “we conclude the as-applied challenge fails.” United States v.
    8
    his challenge de novo. United States v. Pompey, 
    264 F.3d 1176
    , 1179 (10th Cir. 2001)
    (“We review challenges to the constitutionality of a statute de novo.” (quotations
    omitted)); see also People for Ethical Treatment of Prop. Owners v. U.S. Fish & Wildlife
    Serv. (PETPO), 
    852 F.3d 990
    , 1000 (10th Cir. 2017), cert. denied, 
    138 S. Ct. 649
    (2018).
    We reject Mr. Durham’s constitutional challenge to § 2423(c). Congress adopted
    this provision and several others in 2003 as part of a broad regulatory effort that started in
    1907 to combat international sex trafficking. As the following discussion shows,
    Congress could reasonably conclude that United States citizens and permanent residents
    who, in the aggregate, travel to foreign countries and commit illicit sex acts there
    substantially affect foreign commerce. As a result, we must defer to congressional
    judgment and uphold § 2423(c).
    1. Section 2423(c) and Congress’s Efforts to Combat Sex Trafficking
    Section 2423(c) makes it a crime for “[a]ny United States citizen or alien admitted
    for permanent residence [to] travel[] in foreign commerce . . . and engage[] in any illicit
    Morgan, 
    748 F.3d 1024
    , 1031 (10th Cir. 2014). For a statute to be facially
    unconstitutional, Mr. Durham “must establish that [the] law is unconstitutional in all
    of its applications.” City of Los Angeles v. Patel, 
    135 S. Ct. 2443
    , 2451 (2015)
    (quotations omitted); cf. United States v. Stevens, 
    559 U.S. 460
    , 473 (2010) (“In the
    First Amendment context . . . this Court recognizes a second type of facial challenge,
    whereby a law may be invalidated as overbroad if a substantial number of its
    applications are unconstitutional . . . .” (quotations omitted)).
    We therefore address Mr. Durham’s facial challenge through an as-applied
    analysis. Under § 2423(c), Mr. Durham was convicted of engaging in illicit sexual
    conduct abroad after traveling in foreign commerce, the paradigmatic conduct
    targeted under the provision. See, e.g., United States v. Bollinger, 
    798 F.3d 201
    ,
    203-04 (4th Cir. 2015), cert. denied, 
    136 S. Ct. 2448
    (2016); United States v.
    Pendleton, 
    658 F.3d 299
    , 301-02 (3d Cir. 2011). Because we conclude that § 2423(c)
    is constitutional as applied to Mr. Durham, he cannot succeed on either a facial or
    as-applied challenge.
    9
    sexual conduct with another person.” 18 U.S.C. § 2423(c). It is situated within a broad
    anti-sex trafficking statutory scheme that Congress constructed through a century of
    legislation. Congress attempted to address sex trafficking in the early 1900’s by
    prohibiting the importation of women and girls for sexual exploitation. Expanding on
    these efforts, it enacted legislation for the prosecution of individuals who traveled abroad
    intending to engage in sex tourism. But proving intent was difficult. In response,
    Congress passed § 2423(c), which targets individuals who travel abroad and engage in
    illicit sexual conduct regardless of intent. When reviewed in historical context and the
    overall legislative scheme, Congress reasonably viewed § 2423(c) as playing an
    important role in its broader efforts to combat international sex tourism.
    The following discussion describes how § 2423(c) facilitates Congress’s efforts to
    combat international sex tourism. We provide a brief overview of Chapter 117 in Title
    18 of the United States Code, which contains 18 U.S.C § 2423 and other anti-trafficking
    provisions; chart the historical development of § 2423; and review the legislative history
    leading to the enactment of § 2423(c).
    a. Provisions of the statutory scheme
    Chapter 117 criminalizes various activities related to sex trafficking. See 18
    U.S.C. §§ 2421-2428 (titled “Transportation for Illegal Sexual Activity and Related
    Crimes”). It generally prohibits the knowing transport of “any individual in interstate or
    foreign commerce . . . with [the] intent that such individual engage in prostitution, or in
    any sexual activity for which any person can be charged with a criminal offense.” 
    Id. § 2421
    (titled “Transportation generally”). It also targets other activities that facilitate
    10
    sex trafficking. See, e.g., 
    id. § 2422
    (coercion or enticement of individuals to engage in
    prostitution or illicit sexual activity); 
    id. § 2424
    (harboring individuals for purpose of
    prostitution); 
    id. § 2425
    (transmission of information to entice individuals into illicit
    sexual activity).4
    Title 18 U.S.C. § 2423, which falls within Chapter 117, deals specifically with the
    trafficking and sexual exploitation of minors. See 
    id. § 2423
    (titled “Transportation of
    minors”). Its seven provisions criminalize activities that involve illicit sexual contact
    with minors. See 
    id. § 2423
    (a)-(g); see, e.g., 
    id. § 2423
    (a) (the transportation of minors
    for prostitution or illicit sexual activity). Three of its provisions—§ 2423(b), § 2423(c),
    and § 2423(d)—address international sex tourism. Section 2423(b) makes it a crime to
    travel with the intent to engage in illicit sex. See 
    id. § 2423
    (b). Section 2423(c) targets
    individuals who travel abroad and engage in illicit sex—regardless of intent. See 
    id. §2423(c). Section
    2423(d) targets businesses that “arrange[], induce[], procure[] or
    facilitate[] the travel of a person” intending to engage in illicit sexual conduct abroad for
    4
    Chapter 117 also includes sections on sentencing individuals for such
    offenses, definitions of illicit sexual activity, and forfeiture options once an
    individual is convicted. See 18 U.S.C § 2426 (sentencing for repeat offenders); 
    id. § 2427
    (definition of “sexual activity for which any person can be charged with a
    criminal offense” to include production of child pornography); 
    id. § 2428
    (forfeiture
    of property that was used in the commission of crimes or derived from the proceeds
    of crimes).
    11
    financial gain. 
    Id. § 2423(d).
    “Illicit sexual conduct” includes commercial and
    noncommercial sex acts5 with a “person under 18 years of age.” 
    Id. § 2423(f)(1)-(2).6
    b. Early efforts to combat sex trafficking
    Section 2423 developed through a century of legislation addressing international
    sex trafficking. In the early 1900’s, Congress was concerned about the growing sex
    trafficking industry from Europe in particular. In 1907, it prohibited the “importation” of
    women or girls into the United States “for the purpose of prostitution, or for any other
    immoral purpose.” Act of Feb. 20, 1907, Pub. L. No. 59-96, § 3, 34 Stat. 898, 899
    (“1907 Act”) (regulating “the immigration of aliens into the United States”).7 Congress
    recognized this practice as a “present-day existing evil of widespread dimensions” that
    must be stopped. S. Rep. No. 61-702, at 14 (1910).
    Two years later, congressional investigators released a report concluding that the
    1907 Act had failed to stem sex trafficking into the United States. See Importing Women
    5
    For a noncommercial sex act, the conduct would also have to “be in violation
    of Chapter 109A,” which contains various sexual abuse offenses. See 18 U.S.C.
    §§ 2241-2248.
    6
    In the original 1994 version, § 2423(b) criminalized “any sexual act . . . with
    a person under 18 years of age.” See 18 U.S.C. § 2423(b) (1994). The Prosecutorial
    Remedies and Tools Against the Exploitation of Children Today Act of 2003
    (“PROTECT Act”) replaced this phrase with “any illicit sexual conduct with another
    person” and added the definition section in § 2423(f), which includes a definition of
    “illicit sexual conduct” as “a sexual act with a person under 18 years of age.” Pub. L.
    No. 108-21, § 105, 117 Stat. 650, 654 (2003).
    7
    The 1907 Act also prohibited anyone from “keep[ing], maintain[ing],
    control[ling], support[ing], or harbor[ing] in any house or other place” women for the
    purpose of prostitution. § 3, 34 Stat. at 899.
    12
    for Immoral Purposes, S. Doc. No. 61-196, at 33-36 (1909) (recommending a number of
    policy changes addressing the unsolved problem of sex trafficking); H.R. Rep. No. 61-47,
    at 12 (1909). The 1907 Act had focused on stopping the flow of trafficked women at the
    border, but it failed to address the problem of women passing through immigration
    channels undetected. See S. Doc. No. 61-196, at 33-34; see also Ariela R. Dubler,
    Immoral Purposes: Marriage and the Genus of Illicit Sex, 115 Yale L.J. 756, 787 (2006).
    The report recommended criminalizing the interstate transportation of women and girls
    for the purpose of prostitution. S. Doc. No. 61-196, at 36; see also H.R. Rep. No. 61-47,
    at 10 (explaining this change was necessary to prevent the “evil” of importing women
    from foreign nations; otherwise prostitution “can not [sic] be met comprehensively and
    effectively”).
    In response, Congress passed the Mann Act of 1910, attempting to “put a stop to a
    villainous interstate and international traffic in women and girls.” H.R. Rep. No. 61-47,
    at 9; see White-Slave Traffic (Mann) Act, Pub. L. No. 61-277, §§ 2-8, 36 Stat. 825,
    825-27 (1910) (codified at 18 U.S.C. §§ 397-404 (1940)). Section 2 of the Mann Act
    prohibited the transportation of women or girls across state or international lines for the
    purpose of illicit sexual acts. See § 2, 36 Stat. at 825. It is the precursor of the current
    § 2423.8
    8
    The Mann Act has been recodified and amended as 18 U.S.C. §§ 2421-2424.
    Section 2 of the Mann Act parallels 18 U.S.C. § 2423(a), which criminalizes
    knowingly transporting individuals for the purposes of prostitution or illicit sexual
    activity. Compare § 2, 36 Stat. at 825 (codified at 18 U.S.C. § 398 (1940))
    (“[K]nowingly transport[ing] . . . in interstate or foreign commerce . . . any woman or
    girl for the purpose of prostitution or debauchery, or for any other immoral
    13
    In 1978 and 1986, Congress broadened the provisions of the Mann Act to fight sex
    trafficking. In 1978, Congress expanded the law preventing the commercial sexual
    exploitation of girls to include all children. See The Protection of Children Against
    Sexual Exploitation Act of 1977, Pub. L. No. 95-225, § 3, 92 Stat. 7, 8 (1978) (codified at
    18 U.S.C. § 2423(a)(1)-(2) (1982)); see also H.R. Rep. No. 99-910, at 4 (1986). But, as
    Congress acknowledged less than a decade later, the 1978 Act failed to address
    noncommercial exploitation—such as transporting children for the purpose of producing
    child pornography for private rather than commercial use. See H.R. Rep. No. 99-910,
    at 7. In response, Congress passed amendments in 1986 to encompass noncommercial
    sexual exploitation. Child Sexual Abuse and Pornography Act of 1986, Pub. L. No.
    99-628, § 5, 100 Stat. 3510, 3511 (1986) (codified at 18 U.S.C. § 2423 (1988)).
    c. Legislative history leading to passage of § 2423(c)
    The next two major revisions to § 2423 occurred in 1994 and 2003. Congress
    added § 2423(b) and § 2423(c) to target sex tourism.
    i. Enactment of § 2423(b)
    In 1994, Congress enacted § 2423(b) as part of the Violent Crime Control and
    Law Enforcement Act of 1994 (“Violent Crime Act”), making it a crime for “a United
    States citizen . . . [to] travel[] in foreign commerce . . . for the purpose of engaging in any
    purpose . . . .”), with 18 U.S.C. § 2423(a) (“[K]nowingly transport[ing] an individual
    who has not attained the age of 18 years in interstate or foreign commerce . . . with
    intent that the individual engage in prostitution, or in any sexual activity for which
    any person can be charged with a criminal offense . . . .”). Section 2423 also
    contains other provisions to address international sex tourism. See 18 U.S.C. §§
    2423(b)-(f).
    14
    sexual act . . . with a person under 18 years of age . . . .” Pub. L. No. 103-322,
    § 160001(g), 108 Stat. 1796, 2037 (1994) (codified at 18 U.S.C. §§ 2423(a)-(b) (1994)).
    Its passage marked the first time Congress addressed sex tourism as part of its larger
    effort against international sex trafficking.
    Section 2423(b) originated from Senator Charles Grassley’s amendment to the
    Violent Crime Act. In a floor statement, Senator Grassley explained that its purpose was
    to combat child prostitution in the multibillion dollar child pornography and international
    sex tourism industries. See 139 Cong. Rec. 30,391 (1993). He recognized the problem of
    “Americans . . . travel[ing] overseas to places where children are readily available for
    purchase and abuse.” 
    Id. This practice,
    he noted, allowed for “profit from the rape of
    children.” 
    Id. at 30,391-92.
    Representative Jim Ramstad, who proposed a similar
    amendment in the House, see The Child Sexual Abuse Prevention Act of 1994, H.R.
    3993, 103rd Cong. (1994), explained in his floor statement that his amendment was
    intended to “strike a blow at ‘pedophile sex tourism,’ by making it a crime to travel
    overseas for the purpose of sexually abusing children.” 140 Cong. Rec. 6,073 (1994).
    ii. Enactment of § 2423(c)
    Section 2423(b)’s reach was limited to individuals who traveled abroad intending
    to engage in illicit sex acts. But proving intent was difficult. See H.R. Rep. No. 107-525,
    at 2 (2002). In 2003, Congress enacted § 2423(c) to permit the prosecution of individuals
    who travel abroad and engage in illicit sex acts—regardless of whether they intended to
    do so at the time of travel.
    15
    Section 2423(c) was passed as part of the Prosecutorial Remedies and Tools
    Against the Exploitation of Children Today Act of 2003 (“PROTECT Act”), which
    targeted various aspects of the sex tourism industry. See Pub. L. No. 108-21, § 105, 117
    Stat. 650, 654 (2003) (codified at 18 U.S.C. §§ 2423(b)-(g) (2006)). Section 2423(c)
    adopted language from a previous bill—the Sex Tourism Prohibition Improvement Act of
    2002 (“STPIA”)—which had failed to pass, but its history helps in understanding
    § 2423(c). See Child Abduction Prevention Act and the Child Obscenity and
    Pornography Prevention Act of 2003: Hearing Before the Subcomm. on Crime,
    Terrorism, and Homeland Sec. of the H. Comm. on the Judiciary, 108th Cong. 25 (2003)
    (“Hearings”).9 A House Judiciary Committee Report on STPIA noted that a large
    number of developing countries had “fallen prey to the serious problem of international
    sex tourism.” H.R. Rep. No. 107-525, at 2. It acknowledged that § 2423(b)’s intent
    requirement limited the law’s effectiveness. 
    Id. at 3,
    13. Eliminating the intent
    9
    STPIA’s version of the provision read:
    (c) Engaging in Illicit Sexual Conduct in Foreign Places.
    Any United States citizen or alien admitted for permanent
    residence who travels in foreign commerce, and engages in
    any illicit sexual conduct with another person shall be
    fined under this title or imprisoned not more than 15 years,
    or both.
    H.R. 4477, § 2, 107th Cong. (2002).
    16
    requirement, it found, would “close significant loopholes in the law [regarding] persons
    who travel to foreign countries seeking sex with children.” 
    Id. at 3.10
    STPIA’s language was incorporated into the PROTECT Act and ultimately
    became law in § 2423(c). The sponsor of § 2423(c), Representative Jim Sensenbrenner,
    who authored § 2423(c) in both the PROTECT Act and STPIA, explained that sex
    tourism supported one of the “fastest growing areas of international criminal activity”—
    human trafficking. 149 Cong. Rec. 7,625 (2003). The PROTECT Act’s purpose was to
    curb that industry by punishing “persons who travel to foreign countries to engage in
    illegal sexual relations with minors.” 
    Id. at 7,633.
    But unlike § 2423(b), it would do so
    by criminalizing this conduct, “regardless of what [the perpetrator’s] intentions may have
    been when he left the United States.” Hearings at 25 (statement of Daniel P. Collins,
    Associate Deputy Att’y Gen., U.S. Dep’t of Justice). Congress thus passed § 2423(c) to
    fill the enforcement gap created by § 2423(b)’s intent requirement.
    ****
    In sum, Congress has worked to combat sex trafficking—particularly of minors—
    for over a century, developing a statutory scheme targeting sexual exploitation for both
    commercial and noncommercial purposes. Part of this effort included passage of
    § 2423(b), which made it a crime to travel abroad intending to have illicit sex. Because
    the intent requirement limited the statute’s effectiveness, Congress passed § 2423(c) to
    10
    Congressional discussion of STPIA also emphasized the size of the
    international sex trafficking market. Representative Lamar Smith commented that
    “[t]his world sex market is a multi-billion dollar industry that denies children their
    rights, their dignity, and their childhood.” 148 Cong. Rec. 11,222 (2002).
    17
    allow for prosecution regardless of intent. Congress viewed this provision as a critical
    part of its broader efforts to combat the multibillion dollar international sex trafficking
    market.11
    2. The Commerce Clause
    The Commerce Clause delegates power to Congress “[t]o regulate Commerce with
    foreign Nations, and among the several States, and with the Indian Tribes.” U.S. Const.
    art. I, § 8, cl. 3. The following discussion summarizes the Supreme Court’s case law on
    the Interstate Commerce Clause (“ICC”) and Foreign Commerce Clause (“FCC”).
    Although there is “rich case law interpreting the [ICC], the Supreme Court has yet to
    examine the [FCC] in similar depth.” United States v. Bollinger, 
    798 F.3d 201
    , 209 (4th
    Cir. 2015), cert. denied, 
    136 S. Ct. 2448
    (2016); see also United States v. Clark, 
    435 F.3d 1100
    , 1102 (9th Cir. 2006) (noting the FCC’s “scope has yet to be subjected to judicial
    scrutiny”).
    11
    Section 2423(c)’s more recent legislative history bolsters this understanding.
    In 2013, Congress passed the, Violence Against Women Reauthorization Act
    (“VAWRA”), Pub. L. No. 113-4, 127 Stat. 54 (2013). The Act added the “residing
    clause” to § 2423(c): individuals who “reside[], either temporarily or permanently in
    a foreign country” and engage in illicit sexual conduct may also be prosecuted. 
    Id. § 1211,
    127 Stat. at 142 (codified at 18 U.S.C. § 2423(c)). Senator Patrick Leahy
    introduced the “residing clause” to VAWRA through his amendment. See S. Amend.
    21, 113th Cong. (2013) (amending S. 47, 113th Cong. (2013) (enacted)); 159 Cong.
    Rec. 1137 (2013) (statement of Sen. Leahy). He emphasized the amendment targeted
    the global sex trafficking market: “We know that young women and girls often just
    11, 12, or 13 years old are being bought and sold,” and that “millions around the
    world are counting on us.” 
    Id. at 1138.
    18
    a. ICC case law
    The Supreme Court has recognized that the ICC empowers Congress to regulate
    (1) the channels of interstate commerce, (2) the instrumentalities of interstate commerce,
    and (3) activities that substantially affect interstate commerce. United States v. Lopez,
    
    514 U.S. 549
    , 558-59 (1995); Perez v. United States, 
    402 U.S. 146
    , 150 (1971).
    In Lopez, the Court considered whether Congress exceeded its authority under the
    ICC when it prohibited guns near schools in the Gun-Free School Zones Act. See 
    Lopez, 514 U.S. at 551
    . The Court explained that Congress’s power to regulate commerce
    among the states is broad, but federalism concerns limit it. Congressional power “may
    not be extended so as to . . . obliterate the distinction between what is national and what
    is local.” 
    Id. at 557
    (quotations omitted). “[The ICC’s scope] must be considered in the
    light of our dual system of government.” 
    Id. (quotations omitted).
    The Court laid out the
    three categories of regulation, demarcating the ICC’s outer limits. See 
    id. at 557-59.
    i. Channels
    Congress may regulate the channels of interstate commerce. United States v.
    Patton, 
    451 F.3d 615
    , 620 (10th Cir. 2006). It may prohibit the transportation of goods
    and people in interstate channels, effectively halting their interstate movements. See,
    e.g., Caminetti v. United States, 
    242 U.S. 470
    (1917) (upholding statute prohibiting the
    interstate transportation of women for “immoral” purposes); Champion v. Ames, 
    188 U.S. 321
    (1903) (upholding statute prohibiting the transportation of lottery tickets across
    interstate lines). Congress need not be motivated by commercial concerns; it may also
    stop the movement of goods and people to prevent immoral or injurious activities. See,
    19
    e.g., United States v. Darby, 
    312 U.S. 100
    (1941) (upholding a ban on the “injurious”
    transportation of goods produced in substandard labor conditions).
    ii. Instrumentalities
    Congress may regulate the instrumentalities of interstate commerce, or the “means
    of interstate commerce, such as ships and railroads.” 
    Patton, 451 F.3d at 621
    (citing
    
    Lopez, 514 U.S. at 558
    ; 
    Perez, 402 U.S. at 150
    ). Regulation “may extend to intrastate
    activities that threaten these instrumentalities,” such as criminalizing the destruction of a
    grounded aircraft. 
    Id. at 622.
    Congress also may regulate “the persons or things that the instrumentalities are
    moving,” such as criminalizing the theft of goods from an interstate carrier, like a train.
    
    Id. But “not
    all people and things that have ever moved across state lines” qualify as
    permissible targets of regulation. 
    Id. The regulation
    of goods and people extends only to
    the duration of their transport. See 
    id. Thus, under
    this category, Congress may regulate
    goods or people while they are on a ship or plane, but not necessarily once they are
    unloaded or disembark.
    iii. Substantial effect
    Finally, Congress may regulate activity—including intrastate activity—that
    “substantially affects” interstate commerce. 
    Lopez, 514 U.S. at 559
    . The Court has
    upheld, for example, federal regulation of intrastate coal mining, see Hodel v. Va. Surface
    Min. & Reclamation Ass’n, 
    452 U.S. 264
    (1981); intrastate public accommodation
    practices, see Katzenbach v. McClung, 
    379 U.S. 294
    (1964); and homegrown wheat
    production, see Wickard v. Filburn, 
    317 U.S. 111
    (1942). In each instance, the Court
    20
    determined the laws under review regulated activity that had a substantial effect on
    interstate commerce. In making such a determination, courts need decide only whether
    Congress had a “rational basis” that such activities substantially affect interstate
    commerce. Gonzales v. Raich, 
    545 U.S. 1
    , 22 (2005) (quotations omitted).
    In deciding whether federal legislation is constitutional under the ICC, courts
    consider congressional findings or the legislative record regarding the effect of a
    regulated activity. See 
    id. at 21.
    Legislative findings, however, are neither necessary nor
    determinative in a court’s rational-basis decision. See United States v. Morrison, 
    529 U.S. 598
    , 612 (2000) (congressional findings are helpful, but not required nor sufficient
    for upholding a statute); 
    Raich, 545 U.S. at 21
    (particularized findings not necessary).
    In assessing a regulated activity’s effect on interstate commerce, courts need not
    examine the activity in isolation, but may aggregate it. For example, courts may consider
    the effect of not just one farmer’s wheat production on the national grain market, but may
    consider the cumulative effect of all farmers’ production. See 
    Wickard, 317 U.S. at 127-28
    . But courts should do so when the activity is economic as opposed to
    noneconomic. See 
    Morrison, 529 U.S. at 613
    (holding that the effect of domestic
    violence, a noneconomic activity, could not be considered in the aggregate).12 The
    economic-noneconomic distinction arises from federalism concerns and serves to
    preserve “what is truly national and what is truly local.” 
    Lopez, 514 U.S. at 567-68
    .
    12
    Although the Court has discouraged the aggregation of noneconomic
    activity, it has not prohibited it. In Morrison, the Court did not “adopt a categorical
    rule against aggregating the effects of any noneconomic 
    activity.” 529 U.S. at 613
    .
    21
    Courts would otherwise “pile inference upon inference” to determine a regulated activity
    substantially affects commerce. 
    Id. at 567.
    Finally, courts also consider whether the statute contains an express jurisdictional
    element relating to interstate commerce. 
    Id. at 561.
    Congress may explicitly “require an
    additional nexus to interstate commerce” in its statute. 
    Id. at 562.
    For example, a statute
    that criminalizes the possession of a firearm that has traveled in interstate commerce
    contains an express jurisdictional element because violation of the statute hinges on the
    firearm’s connection to interstate commerce. 
    Id. (using what
    was formerly 18 U.S.C.
    § 1202(a) as an example).
    b. FCC case law
    Under the FCC, Congress may regulate commerce “with foreign Nations.” U.S.
    Const. art. I, § 8, cl. 3. There is “precious little case law” on the FCC. United States v.
    Pendleton, 
    658 F.3d 299
    , 307 (3d Cir. 2011); see 
    Clark, 435 F.3d at 1102
    (noting
    “[c]ases involving the reach of the [FCC] . . . are few and far between”). Two Supreme
    Court cases, however, provide some guidance.
    First, in Board of Trustees of University of Illinois v. United States, 
    289 U.S. 48
    (1933), the Court upheld a federal tariff under the FCC. The University of Illinois argued
    that the tariff interfered with its importation of goods and was thus unconstitutional. 
    Id. at 56.
    The Court disagreed, holding that Congress had acted within its “constitutional
    authority to regulate Commerce with foreign nations,” 
    id. (quotations omitted),
    which
    includes imposing duties on imports, “pass[ing] embargo and non-intercourse laws,” and
    making “all other regulations necessary to navigation, to the safety of passengers, and the
    22
    protection of property,” 
    id. at 58
    (quotations omitted). This power “comprehend[s] every
    species of commercial intercourse between the United States and foreign nations,” 
    id. at 56
    (quoting Gibbons v. Ogden, 
    22 U.S. 1
    , 193 (1824)), and is “exclusive and plenary,” 
    id. The Court
    further explained that the federalism constraints limiting Congress’s
    ICC power do not apply in the FCC context. “The principle of duality in our system of
    government does not touch the authority of Congress in the regulation of foreign
    commerce.” 
    Id. at 57.
    The university had argued that the Constitution prohibited the
    taxation of state entities, in particular that federal taxation “is subject to the constitutional
    limitation that the Congress may not tax so as to impose a direct burden upon an
    instrumentality of a state used in the performance of a governmental function.” 
    Id. at 57-58.
    The tariff, however, was not a tax passed under the Congress’s taxing power, but
    was instead a regulation passed under its FCC power. Because “the immunity of state
    instrumentalities . . . [was] implied from the necessity of maintaining our dual system,”
    this constitutional limitation did not extend to statutes regulating foreign commerce. 
    Id. at 59.
    Rather, as in international relations, the “United States act[s] through a single
    government with unified and adequate power” in the foreign commerce arena. 
    Id. Second, in
    Japan Line, Ltd. v. County of Los Angeles, 
    441 U.S. 434
    (1979), the
    Court struck down California’s property tax on shipping containers as a violation of the
    dormant FCC.13 Japan Line, a Japanese shipping company, owed more than $550,000 in
    13
    As with the ICC, the Court has recognized that, in addition to delegating
    express power to regulate foreign commerce, the FCC implicitly restricts the states
    from regulating foreign commerce. See Japan 
    Line, 441 U.S. at 449
    (discussing the
    “negative implications” of Congress’s power under the FCC).
    23
    taxes on its shipping containers under California law. 
    Id. at 437.
    The company
    challenged the state tax’s constitutionality. 
    Id. at 440-41.
    It argued that because the
    containers traveled only in foreign commerce, they were foreign instrumentalities—as
    opposed to interstate instrumentalities—and the dormant FCC protected foreign
    commerce from state interference such as the California tax. See 
    id. at 437-38.
    The Court agreed with Japan Line and concluded the state tax “may impair federal
    uniformity in an area where federal uniformity is essential.” 
    Id. at 448.
    Normally, if a
    state tax is “applied to an activity with a substantial nexus with the taxing State, is fairly
    apportioned, [and] does not discriminate against interstate commerce, . . . no
    impermissible burden on interstate commerce will be found.” 
    Id. at 444-45
    (quotations
    omitted). State taxes on foreign entities are different, however, because there is a “need
    for uniformity in treating with other nations.” 
    Id. at 448.
    States imposing their own taxes
    might create “asymmetry in the international tax structure,” and foreign governments
    may retaliate in their trade policies with the United States. 
    Id. at 450.
    Compared with the
    ICC, “the Founders intended the scope of the foreign commerce power to be the greater,”
    
    id. at 448,
    and thus states are more likely to offend the FCC—rather than the ICC—with
    their taxation policy, see 
    id. at 448-49.
    California’s tax was therefore unconstitutional
    under the dormant FCC. 
    Id. at 453-54.
    3. Congressional Authority Broader Under the FCC than the ICC
    “[The] scope [of the FCC] has yet to be subjected to judicial scrutiny.” 
    Clark, 435 F.3d at 1102
    . This section compares the boundaries of congressional authority under the
    24
    FCC and the ICC. It describes how the FCC, unconstrained by federalism considerations,
    provides Congress broader authority to regulate commerce than the ICC.
    Congressional authority under the FCC is broad because Congress must speak
    with “one voice” in the foreign commerce context. Japan 
    Line, 441 U.S. at 449
    (quotations omitted). Moreover, as the dissent appears to agree, federalism limits
    congressional authority under the ICC, but not the FCC. See Dissent Op. at 27. And, as
    the Supreme Court has stated, “[a]lthough the Constitution, Art. I, § 8, cl. 3, grants
    Congress power to regulate commerce ‘with foreign Nations’ and ‘among the several
    States’ in parallel phrases, there is evidence that the Founders intended the scope of the
    foreign commerce power to be the greater.” Japan 
    Line, 441 U.S. at 448
    ; see also Atl.
    Cleaners & Dyers v. United States, 
    286 U.S. 427
    , 434 (1932) (“[Congressional] power
    when exercised in respect of foreign commerce may be broader than when exercised as to
    interstate commerce.”).
    Because the FCC concerns commerce “with foreign Nations”—as opposed to
    commerce “among the several States”— the federalism considerations that constrain
    Congress’s authority under the ICC do not apply to the FCC, which therefore confers
    broader authority on Congress. Bd. of 
    Trustees, 289 U.S. at 57
    (“The principle of duality
    in our system of government does not touch the authority of Congress in the regulation of
    foreign commerce.”). History, text, and purpose support this conclusion.
    a. History
    For the Founders, expansive congressional control over foreign commerce was
    imperative. They wanted the federal government to have enough authority to promote
    25
    foreign commerce, which comprised most of the early American economy. See Scott
    Sullivan, The Future of the Foreign Commerce Clause, 83 Fordham L. Rev. 1955,
    1962-65 (2015). An 1877 report from the Treasury Department noted that at the time of
    the founding, “our foreign commerce . . . attracted public attention much more than did
    the comparatively small internal commerce.” Joseph Nimmo, Jr., Department of
    Treasury, Report on the Internal Commerce of the United States 8 (1877). Under the
    Articles of Confederation, state interference had disrupted foreign commerce, and federal
    power to tax and to regulate commerce was completely absent. See Sullivan at 1962-64.
    States circumvented federal trade agreements with foreign nations by negotiating their
    own. 
    Id. Because foreign
    commerce was so vital to the American economy, the Founders
    sought to bolster federal power over international trade and ensure that the federal
    government could “speak with one voice when regulating commercial relations with
    foreign governments.” Japan 
    Line, 441 U.S. at 449
    (quotations omitted). The FCC was
    designed as the “great and essential power” that the ICC merely “supplement[s].” The
    Federalist No. 42, at 283 (James Madison) (J. Cooke ed. 1961); see also United States v.
    Baston, 
    818 F.3d 651
    , 668 (11th Cir. 2016), cert. denied, 
    137 S. Ct. 850
    (2017).
    b. Text
    The FCC’s text reflects the Founders’ objective to provide broader authority than
    under the ICC. Again, the Commerce Clause delegates power to Congress “[t]o regulate
    Commerce with foreign Nations, and among the several States, and with the Indian
    Tribes.” U.S. Const. art. I, § 8, cl. 3 (emphases added). The difference between “with”
    26
    and “among” affects the scope of the FCC and the ICC. See Sullivan at 1966-67
    (describing how the difference allows states to retain some lawmaking authority under
    the ICC, but Congress retains full authority under the FCC and Indian Commerce
    Clause).
    In Gibbons v. Ogden, the Supreme Court discussed the word “among” when it
    acknowledged that Congress may regulate intrastate activity under the ICC. 
    22 U.S. 1
    ,
    194 (1824). It said “[t]he word ‘among’ means intermingled with,” and “[c]ommerce
    among the States[] cannot stop at the external boundary line of each State, but may be
    introduced into the interior.” 
    Id. But the
    Court also recognized limits to ICC authority.
    “Comprehensive as the word ‘among’ is, it may very properly be restricted to that
    commerce which concerns more States than one.” 
    Id. The word
    “among” restricts
    Congress from regulating “those [internal concerns] which are completely within a
    particular State.” 
    Id. at 195;
    see also 
    Lopez, 514 U.S. at 553
    (“The Gibbons Court . . .
    acknowledged that limitations on the commerce power are inherent in the very language
    of the Commerce Clause.”).
    After its discussion of commerce “among the several States,” the Gibbons Court
    contrasted commerce “with foreign nations.” 
    Gibbons, 22 U.S. at 195
    . “[I]n regulating
    commerce with foreign nations, the power of Congress does not stop at the jurisdictional
    lines of several States.” 
    Id. Though the
    Court did not elaborate on the word “with,” it
    pointed to the textual difference in the two clauses. “Among” in the ICC restrains
    Congress in regulating intrastate matters—a restraint not present in the FCC.
    27
    Both the FCC and the Indian Commerce Clause contain the preposition “with,”
    and the Court has drawn comparisons between the two. The Indian Commerce Clause
    provides broad “plenary power” to Congress in regulating commerce with Indian tribes.
    United States v. Lara, 
    541 U.S. 193
    , 200 (2004) (quotations omitted). The Court has
    recognized a similar breadth of authority under the FCC. “The power to regulate foreign
    commerce is certainly as efficacious as that to regulate commerce with the Indian tribes.”
    Buttfield v. Stranahan, 
    192 U.S. 470
    , 493 (1904); see also United States v. Forty-Three
    Gallons of Whiskey, 
    93 U.S. 188
    , 194 (1876) (“Congress now has the exclusive and
    absolute power to regulate commerce with the Indian tribes[]—a power as broad and as
    free from restrictions as that to regulate commerce with foreign nations.”).14
    c. Purpose
    Both the FCC and the ICC empower Congress to address national interests, but
    federalism concerns do not constrain the FCC as they do the ICC. The ICC’s purpose is
    14
    The dissent counters that the “difference in prepositions indicates the
    opposite.” Dissent Op. at 20. It posits that “[i]f the [FCC] permitted regulation of
    commerce ‘among foreign nations’ . . . then Congress would be empowered to
    regulate commerce among France, England, and Italy,” suggesting that “among” is
    broader than “with.” 
    Id. But the
    relevant comparison is not between the FCC’s use
    of “with” and a hypothetical FCC’s use of “among.” Rather, it is between the FCC’s
    use of “with” and the ICC’s use of “among.” Looking at these words in context
    supports our interpretation. In Gibbons, after discussing how “among” prevented
    Congress from regulating “those [internal concerns] which are completely within a
    particular State,” the Court stated that the phrase “with foreign nations” means “the
    power of Congress does not stop at the jurisdictional lines of the several States.”
    
    Gibbons, 22 U.S. at 195
    . Because “with foreign nations” allows for federal regulation of
    activity within states without limitation, the Court in Gibbons suggests the phrase confers
    broader authority. Moreover, the use of “with” in the Indian Commerce Clause suggests
    broader authority, granting “plenary power” in regulating commerce with Indian tribes.
    See 
    Lara, 541 U.S. at 200
    (quotations omitted).
    28
    to enable Congress to regulate interstate commerce in a federal system. It empowers
    Congress to regulate on behalf of national economic concerns as long as the regulation
    does not interfere with “truly local” affairs. 
    Lopez, 514 U.S. at 568
    . The ICC permits
    Congress to ensure that “[i]nterstate trade [i]s not left to be destroyed or impeded by the
    rivalries of local government,” The Shreveport Rate Case, 
    234 U.S. 342
    , 350 (1914), but
    federalism concerns cabin Congress’s power to regulate. “[T]he scope of the interstate
    commerce power must be considered in the light of our dual system of government and
    may not be extended so as to embrace effects upon interstate commerce so indirect and
    remote that to embrace them . . . would effectually obliterate the distinction between what
    is national and what is local . . . .” 
    Lopez, 514 U.S. at 557
    (quotations omitted).
    The FCC’s purpose is to enable Congress—and thus the nation—to speak with one
    voice on international matters. “In international relations and with respect to foreign
    intercourse and trade the people of the United States act through a single government
    with unified and adequate national power.” Bd. of 
    Trustees, 289 U.S. at 59
    . Unlike with
    the ICC, federalism concerns do not limit FCC authority. See Japan 
    Line, 441 U.S. at 448
    n.13 (stating that “Congress’[s] power to regulate foreign commerce” is not limited
    by “considerations of federalism and state sovereignty”).
    d. The dissent’s view
    The dissent questions whether congressional authority is broader under the FCC
    than the ICC. See Dissent Op. at 27. It concedes that the FCC is broader than the ICC in
    certain situations. See 
    id. at 21.
    But it disagrees we have such a situation here. First, it
    argues that the FCC’s scope is broader only when applied to restricting state regulation in
    29
    the dormant FCC context. Second, it argues that the sovereignty of other nations
    constrains FCC authority.15
    i. Japan Line and the scope of FCC power
    The dissent attempts to limit Japan Line’s statement that the “scope of the foreign
    commerce power [is] greater” than the interstate power. Japan 
    Line, 441 U.S. at 448
    . It
    appears to argue that any suggestion in Japan Line that the FCC delegates broader
    authority to Congress than the ICC is limited to the context of that case—a dormant
    commerce doctrine challenge to state regulation. See Dissent Op. 16-18. Distinguishing
    between the FCC’s grant of “congressional power to regulate” and the dormant FCC’s
    “restriction on the States” to legislate, 
    id. at 17,
    the dissent argues that the Court in Japan
    Line examined the latter, not the former. But the scope of FCC authority is the same
    regardless of whether a case involves a challenge to a state’s power to regulate commerce
    15
    The dissent starts with a line in Gibbons: “[Commerce] carr[ies] the same
    meaning throughout the [Commerce Clause] . . . unless there be some plain
    intelligible cause which alters it.” Dissent Op. at 5 (quoting 
    Gibbons, 22 U.S. at 194
    ). The dissent also “infer[s] that the same proposition applies to the word
    regulate in the Clause.” 
    Id. It assumes
    the Indian Commerce, Foreign Commerce, and Interstate
    Commerce Clauses convey the same power absent a “plain, intelligible cause.” But
    even though “commerce” and “regulate” may “carry the same meaning” throughout
    the Commerce Clause, each modifier—Indian, Foreign, and Interstate—and its
    accompanying preposition—“among” and “with”—describe a different context. See
    Atlantic Cleaners & 
    Dyers, 286 U.S. at 434
    (Although “the power to regulate commerce
    is conferred by the same words of the commerce clause with respect both to foreign
    commerce and interstate commerce . . . the power when exercised in respect of foreign
    commerce may be broader than when exercised as to interstate commerce.”). As the
    dissent acknowledges, for example, the Indian Commerce Clause grants Congress a
    broader power than the ICC, despite the meaning of commerce and regulate
    remaining the same in both provisions. See Dissent Op. at 5-6 (quoting 
    Lara, 541 U.S. at 200
    ).
    30
    or to the federal government’s power to legislate. Supreme Court precedent makes this
    clear.
    By way of background, the Constitution does not contain a dormant Commerce
    Clause. The doctrine derives from the Commerce Clause itself, which provides that
    “Congress shall have [the] power . . . [t]o regulate commerce . . . among the several
    States.” U.S. Const. art. I, § 8, cl. 3. As to matters within the scope of the Commerce
    Clause power, Congress may choose to regulate, thereby preempting the states from
    doing so, see Gade v. Nat’l Solid Wastes Mgmt. Ass’n, 
    505 U.S. 88
    , 96-98 (1992); Rice v.
    Santa Fe Elevator Corp., 
    331 U.S. 218
    , 230 (1947), or to authorize the states to regulate,
    see In re Rahrer, 
    140 U.S. 545
    , 555-56 (1891); Prudential Ins. Co. v. Benjamin, 
    328 U.S. 408
    , 429-31 (1946).
    If Congress is silent—neither preempting nor consenting to state regulation—and
    a state attempts to regulate in the face of that silence, the Supreme Court, going back to
    
    Gibbons, 22 U.S. at 236-37
    (1824) (Johnson, J., concurring), and Cooley v. Bd. of Port
    Wardens, 
    53 U.S. 299
    , 318-19 (1851), has interpreted the Commerce Clause to limit state
    regulation of interstate commerce by applying the negative implications of the Commerce
    Clause—“these great silences of the Constitution,” H.P. Hood & Sons, Inc. v. Du Mond,
    
    336 U.S. 525
    , 535 (1949); see White v. Mass. Council of Constr. Emp’rs, Inc., 
    460 U.S. 204
    , 213 (1983). Accordingly, the Commerce Clause is both an express grant of power
    to Congress and an implicit limit on the power of state and local government. See
    Comptroller of the Treasury of Md. v. Wynne, 
    135 S. Ct. 1787
    , 1794 (2015); Kleinsmith
    v. Shurtleff, 
    571 F.3d 1033
    , 1039 (10th Cir. 2009). The dormant Commerce Clause
    31
    doctrine extends to state regulation that may conflict with Congress’s foreign commerce
    regulatory authority. See, e.g., Japan Line, 
    441 U.S. 434
    .
    When the Supreme Court has considered dormant commerce doctrine challenges
    to state regulation, it has recognized that the scope of Congress’s affirmative powers
    under the Commerce Clause and the scope of commerce subject to the dormant
    Commerce Clause are coextensive. See, e.g., Lewis v. BT Inv. Managers, Inc., 
    447 U.S. 27
    , 39 (1980); Philadelphia v. New Jersey, 
    437 U.S. 617
    , 622-23 (1978). It follows,
    contrary to the dissent, that if the Supreme Court, in a dormant Commerce Clause case,
    recognizes, as it did in Japan Line, that the FCC confers broader authority on Congress
    than the ICC, then Congress’s authority is broader under the FCC in general.
    The dissent is correct that the Court in Japan Line “did not say that the term
    commerce has a broader meaning in the foreign-commerce context,” Dissent Op. at
    16, but it did say “the Founders intended the scope of the foreign commerce power to
    be greater,” Japan 
    Line, 441 U.S. at 448
    . The Court’s statement thus sheds light on
    the FCC’s outer limits for both its grant of congressional authority and its restriction
    on states.
    ii. Sovereignty of other nations
    Although the dissent concedes that state sovereignty does not limit the FCC, it
    “reject[s] the notion that . . . the power under the [FCC] to regulate conduct in foreign
    nations is unconstrained,” Dissent Op. at 27, and suggests that the sovereignty of other
    nations limits the FCC. The dissent presents no relevant authority—text, history, or
    32
    precedent—that the sovereignty of foreign nations limits Congress’s authority under the
    FCC.
    An enumerated power both confers and constrains legislative authority. See
    Richard Primus, The Limits of Enumeration, 124 Yale L.J. 576, 578 (2014). Internal
    limits “are the boundaries of Congress’s powers taken on their own terms,” 
    id., that is,
    based on the language of the text itself. For example, an internal limit on Congress’s
    power under the Commerce Clause is the meaning of the word “commerce.” By contrast,
    external limits “are affirmative prohibitions that prevent Congress from doing things that
    would otherwise be permissible exercises of its powers.” 
    Id. Federalism and
    the Bill of
    Rights, for example, externally limit legislative authority under the Constitution’s
    enumerated powers. See, e.g., 
    Lopez, 514 U.S. at 557
    (“[T]he scope of the interstate
    commerce power must be considered in the light of our dual system of government.”
    (quotations omitted)); New York v. United States, 
    505 U.S. 144
    , 156 (1992) (“[U]nder the
    Commerce Clause Congress may regulate publishers engaged in interstate commerce, but
    Congress is constrained in the exercise of that power by the First Amendment.”).
    First, the FCC is an enumerated power and therefore defines and limits that power
    by its own terms. The FCC’s internal limits derive from the words “commerce,”
    “regulate,” and “with foreign nations.”16 The Framers did not think, nor do we, that the
    FCC conferred “plenary power to police the behavior of Americans in foreign
    countries.” Dissent Op. at 23. The power to regulate foreign commerce, like all of
    16
    These limits are reflected in the doctrinal framework we draw from the third
    Lopez category and adapt for the foreign commerce context. See infra Part II.A.4.
    33
    Congress’s enumerated powers, “[is] defined, and limited.” Marbury v. Madison, 
    5 U.S. 137
    , 176 (1803). But because federalism concerns do not apply in the foreign commerce
    context, congressional authority is broader under the FCC than the ICC.
    Second, the dissent’s suggestion that the sovereignty of foreign nations is an
    “external limit” on the FCC finds no traction. No provision in the Constitution restricts
    the FCC in this manner. Unlike federalism, an integral part of our constitutional
    structure, and unlike the Bill of Rights, an express set of limits on government power,
    foreign nation sovereignty appears nowhere in the constitutional scheme—either in the
    Constitution itself or the cases interpreting it.17
    17
    To support its foreign state sovereignty theory, the dissent quotes The
    Schooner Exchange v. McFaddon, 
    11 U.S. 116
    (1812), and Alexander Hamilton’s The
    Defence, Dissent Op. at 23-24 (quoting Schooner 
    Exch., 11 U.S. at 136
    and Alexander
    Hamilton, The Defence No. XXXVI (Jan. 2, 1796), in 20 The Papers of Alexander
    Hamilton (Harold C. Syrett ed. 1974)), but their relevance to congressional authority
    under the FCC is unclear.
    First, The Schooner Exchange established that foreign sovereigns and their
    instruments may not be hailed into American courts, which hardly speaks to
    congressional authority to regulate foreign commerce under the FCC. See Verlinden
    B.V. v. Central Bank of Nigeria, 
    461 U.S. 480
    , 486 (1983) (describing foreign
    sovereign immunity as a matter of comity and grace and not a constitutional
    restriction). Second, the dissent’s Hamilton quote comes from his thirty-sixth essay
    in 1796 advocating for adoption of the proposed Jay Treaty with Great Britain and
    explaining why the treaty was constitutional. The essay mentions the FCC in its
    discussion distinguishing treaties and laws. But it sheds little light on our issue here,
    other than perhaps Hamilton’s comment that the power to make laws for the nation
    under the FCC reaches its citizens abroad. See The Defence No. XXXVI (Jan. 2,
    1796), in 20 The Papers of Alexander Hamilton (Harold C. Syrett ed. 1974) (the power to
    make laws “acts . . . upon its own citizens . . . without its territory in certain cases and
    under certain limitations. But it can have no obligatory action whatsoever upon a
    foreign nation or any person or thing within the jurisdiction of such foreign Nation.”
    (emphasis added)). Mr. Durham was charged when he returned to the jurisdiction of
    the United States.
    34
    International rules of sovereignty and jurisdiction do not affect the scope of
    Congress’s authority under the Constitution. They concern issues of international law,
    custom, and politics, not constitutional ones. See, e.g., Verlinden B.V. v. Central Bank of
    Nigeria, 
    461 U.S. 480
    , 486 (1983) (“The Schooner Exchange made clear . . . foreign
    sovereign immunity is a matter of grace and comity on the part of the United States, and
    not a restriction imposed by the Constitution.”). Whether a statute conflicts with a
    foreign law or policy may implicate international law and politics, not whether Congress
    may pass such a statute under the FCC.
    Moreover, the Court has long recognized Congress’s authority to pass
    extraterritorial laws that apply to conduct in foreign countries. The dissent suggests any
    law with application in a foreign country “would imply a diminution of [the foreign
    country’s] sovereignty . . . .” Dissent Op. at 23 (quoting The Schooner 
    Exch., 11 U.S. at 136
    ). But the Supreme Court has recognized “Congress has the authority to enforce its
    laws beyond the territorial boundaries of the United States.” E.E.O.C. v. Arabian Am. Oil
    Co., 
    499 U.S. 244
    , 248 (1991). Indeed, the application of a federal statute “so far as
    citizens of the United States in foreign countries are concerned, is one of construction,
    not of legislative power.” Blackmer v. United States, 
    284 U.S. 421
    , 437 (1932).
    Finally, the statute at issue in this case, § 2423(c), does not impinge on the
    sovereignty of other nations. It does not prevent another country from enforcing its child
    sex abuse laws against an American traveling there. For example, in 
    Pendleton, 658 F.3d at 301
    , Thomas Pendleton was first arrested, convicted, and sentenced in Germany—
    where he had molested a 15-year-old boy—under German law. After he had served his
    35
    19 months in a German prison, the United States then charged him under § 2423(c) for
    his illicit conduct. 
    Id. iii. Summary
    The dissent attempts to argue that congressional authority under the FCC is not
    broader than under the ICC by (1) restricting Japan Line’s statement about the breadth of
    FCC authority to the dormant FCC context and (2) suggesting foreign state sovereignty
    as an external limit on FCC authority. We disagree. As we have shown, the Japan Line
    statement is relevant, binding, and speaks to the reach of the FCC generally. See Gaylor
    v. United States, 
    74 F.3d 214
    , 217 (10th Cir. 1996) (“While these statements are dicta,
    this court considers itself bound by Supreme Court dicta almost as firmly as by the
    Court’s outright holdings.”). And the dissent’s foreign state sovereignty theory lacks
    merit or support.
    ****
    Congressional authority under the FCC is broader than under the ICC. The
    Founders wanted to boost foreign trade—the early nation’s economic engine—through a
    broad delegation of authority to Congress under the FCC. They did so in the Commerce
    Clause, distinguishing the ICC and FCC by using the terms “among” and “with,”
    respectively. Though Congress may advance national interests under both clauses,
    federalism interests limit congressional authority under the ICC and not the FCC.
    4. The Lopez Categories in the Foreign Commerce Context
    The three Lopez categories provide a useful starting point in analyzing challenges
    under the FCC. The following explains why the third category applies to this case, traces
    36
    its evolution in the interstate commerce context, and explains how it should be analyzed
    in the foreign commerce context. Because the federalism concerns limiting the third
    Lopez category do not apply to the foreign commerce context, the substantial-effect
    analysis is different under the FCC than the ICC. See 
    Bollinger, 798 F.3d at 215
    (Without alteration, “the third Lopez category . . . [would be] unduly demanding in the
    foreign context.”).
    a. The ICC’s three categories as a starting point
    The dissent agrees that we “can adopt the Interstate Commerce Clause
    doctrine[’s] . . . three types of regulation” to consider constitutional challenges under the
    FCC. Dissent Op. at 27; see also 
    Pendleton, 658 F.3d at 308
    (finding “Lopez’s ‘time-
    tested’ framework” suitable for the foreign commerce context). The few Supreme Court
    decisions about the FCC also describe similar categories—channels, instrumentalities,
    and activities affecting commerce with foreign nations. See Bd. of 
    Trustees, 289 U.S. at 57
    (upholding a tariff under the FCC based on Congress’s authority to regulate the
    movement of goods in foreign commerce); Japan 
    Line, 441 U.S. at 454-55
    (invalidating a
    state’s tax on the “instrumentalities of foreign commerce” under the dormant FCC); Bd.
    of 
    Trustees, 289 U.S. at 58
    (recognizing Congress’s authority to legislate under the FCC
    and “consider the conditions of foreign trade in all its aspects and effects”) (emphasis
    added)).
    Although the three Lopez categories “provide a useful starting point in defining
    Congress’s powers under the [FCC],” 
    Bollinger, 798 F.3d at 215
    , they are not an end
    point. In light of the FCC’s broader grant of authority, we consider the third Lopez
    37
    category, how it has evolved, and whether its analysis needs to be adapted for application
    in the foreign commerce context. See id.; see also United States v. Bredimus, 
    352 F.3d 200
    , 204-08 (5th Cir. 2003) (recognizing the FCC’s broader grant of authority while also
    applying the ICC framework); United States v. Cummings, 
    281 F.3d 1046
    , 1049 n.1 (9th
    Cir. 2002) (same).
    b. The substantial-effect category is applicable here
    To determine which Lopez categories apply to this case, we must consider the
    nature of the regulation under § 2423(c). In passing this statute, Congress criminalized
    the combination of “travel in foreign commerce” and “engag[ing] in any illicit sexual
    conduct.” See 18 U.S.C. § 2423(c). The third Lopez category concerns a wide range of
    statutes that purport to regulate “activities” substantially affecting interstate commerce.
    See 
    Morrison, 529 U.S. at 609
    ; 
    Lopez, 514 U.S. at 558
    -59. Because § 2423(c) regulates
    the activity of illicit sexual conduct, we analyze its constitutionality under the third
    category. See 
    Morrison, 529 U.S. at 609
    .18
    c. Evolution of the third Lopez category
    This section traces the evolution of the third Lopez category as the foundation to
    explain how it applies in the foreign commerce context. The Court has developed the
    third category’s jurisprudence in three important cases—Wickard, 317 U.S 111, Lopez,
    18
    Because we determine that § 2423(c) is constitutional under the third
    category, we need not analyze it under the first and second. We note that § 2423(c)
    does not regulate the instrumentalities of foreign commerce and that the Third Circuit
    has upheld the constitutionality of § 2423(c) as a valid regulation of the channels of
    foreign commerce. See 
    Pendleton, 658 F.3d at 311
    .
    38
    
    514 U.S. 549
    , and Morrison, 
    529 U.S. 598
    —and has applied it in Raich, 
    545 U.S. 1
    , in a
    manner particularly relevant to this case. Federalism considerations have played a
    pivotal role.
    In Wickard, the Court upheld the Agricultural Adjustment Act’s quota for wheat
    production, which had been enacted to maintain wheat prices, by applying an aggregate-
    effects analysis to “those activities intrastate which so affect interstate commerce.” 317
    U.S at 114, 128 (quoting United States v. Wrightwood Dairy Co., 
    315 U.S. 110
    , 119
    (1942)). Under the Act, Roscoe Filburn had exceeded his allotment, which he had
    harvested for personal consumption, and was fined. 
    Id. at 114-15.
    Even though his
    wheat production had only a de minimis effect on interstate commerce, the Court found
    the cumulative effect of all farmers’ home-grown wheat production substantially affected
    the interstate wheat market and upheld the Act. 
    Id. at 127-28.
    Through its use of this
    aggregation analysis, Wickard “ushered in an era of Commerce Clause jurisprudence that
    greatly expanded the previously defined authority of Congress under the Clause.” 
    Lopez, 514 U.S. at 556
    .
    Between 1937 and 1995, the Court did not invalidate one federal law under the
    ICC. See Erwin Chemerinsky, Constitutional Law § 3.4.4 (5th ed. 2015). But in Lopez,
    
    514 U.S. 549
    , it struck down the Gun-Free School Zones Act of 1990, which made it a
    crime to have a gun within 1,000 feet of a school, as exceeding congressional authority
    under the ICC. 
    Id. at 551,
    567-68. The Court determined the gun legislation attempted to
    regulate in the third category and concluded that gun possession near schools did not
    substantially affect interstate commerce. 
    Id. at 559,
    561. It noted that the statute had
    39
    “nothing to do with commerce” and was “not an essential part of a larger regulation of
    economic activity,” which distinguished this case from Wickard. 
    Id. at 561
    (quotations
    omitted). Further, the Court pointed out that neither the statute nor its legislative history
    contained express legislative findings that the regulated activity substantially affected
    interstate commerce. 
    Id. at 562-63.
    Accordingly, “[t]he possession of a gun in a local
    school zone is in no sense an economic activity that might, through repetition elsewhere,
    substantially affect any sort of interstate commerce.” 
    Id. at 567.
    In Lopez, federalism shaped the outer limit of the substantial-effect ICC analysis.
    The Court declined to aggregate the noneconomic activity of gun possession near
    schools. 
    Id. at 561.
    It rejected the government’s arguments that gun possession near
    schools would adversely affect students’ learning environments, which, in turn, would
    have a negative effect on the national economy. 
    Id. at 564.
    The connection was too
    tenuous for the Court. To have upheld the statute by “pil[ing] inference upon inference”
    would mean “there [would] never [] be a distinction between what is truly national and
    what is truly local.” 
    Id. at 567-68.
    If the Court were to follow such logic, the ICC would
    grant Congress a general police power over such areas as education, a traditional concern
    of the states. 
    Id. at 565-66.
    Five years later, the Court in Morrison struck down the Violence Against Women
    Act of 1994, which authorized victims of gender-motivated crimes to sue for 
    damages. 529 U.S. at 601-02
    . Although Congress had made detailed findings that gender-based
    violence substantially affected interstate commerce, including deterrence of interstate
    travel, the Court declined to draw the connection. 
    Id. at 614-15.
    It declined to do so
    40
    because it regarded gender-based violence as noneconomic activity. Id at 617. The
    Court discouraged “aggregating the effects of any noneconomic activity.” 
    Id. at 613
    (noting that “our cases have upheld Commerce Clause regulation of intrastate activity
    only where that activity is economic in nature”). As in Lopez, the Court refused to accept
    the “but-for causal chain from the initial occurrence of violent crime . . . to every
    attenuated effect upon interstate commerce.” 
    Id. at 615.
    The Court said the federalism “concern that [it] expressed in Lopez that Congress
    might use the Commerce Clause to completely obliterate the Constitution’s distinction
    between national and local authority seems well founded.” 
    Id. at 615.
    Were the Court to
    accept aggregated noneconomic activity, Congress could potentially regulate purely
    intrastate matters, such as violent crime and family affairs. 
    Id. at 615-17.
    Finally, in Raich, the Court upheld the application of the Controlled Substances
    Act (“CSA”) to the home cultivation and possession of 
    marijuana. 545 U.S. at 21-22
    .
    Even though the CSA contained no particularized congressional findings, the Court
    determined from the legislative history and the statutory scheme that Congress could
    reasonably conclude noncommercial marijuana production and possession substantially
    affects the interstate market for illicit drugs and that the prohibition is an essential part of
    a broader economic regulation. 
    Id. at 22,
    27. As discussed further below, this case
    supports upholding § 2423(c).
    ****
    In sum, the Court has limited congressional authority under the third Lopez
    category due to federalism concerns. In Lopez and Morrison, it refused to aggregate
    41
    noneconomic activities to determine whether the regulated activity had a substantial
    effect on interstate commerce. It feared that such reasoning would obliterate the
    distinction between local and national interests in our system of dual federalism and
    allow congressional regulation of purely intrastate matters.
    d. Adapting the third Lopez category to the FCC
    For legislation under the FCC that regulates activity, the federalism constraints
    developed for ICC challenges do not apply. The Lopez category-three analysis must
    therefore be modified for the foreign commerce context.
    Congressional authority under the third Lopez category extends further in the FCC
    context. Because the federalism considerations underlying the ICC do not arise in the
    regulation of foreign commerce, the economic and noneconomic distinction, which
    otherwise discourages the aggregation of noneconomic activity, is unnecessary.
    In Lopez, Morrison, and Raich, the Supreme Court recognized limits on
    Congress’s power under the ICC based on federalism concerns. To preserve “the
    distinction between what is national and what is local,” 
    Lopez, 514 U.S. at 557
    , the
    Court distinguished between commercial and noncommercial activity and between
    economic and noneconomic activity. It discouraged aggregating noneconomic
    activities to determine whether an activity has a substantial effect on interstate commerce.
    These distinctions are therefore tied to the external federalism limit on Congress’s
    ICC power.
    Federalism limits do not apply to Congress’s FCC power and therefore do not
    constrain application of the substantial-effect analysis in the FCC context. “It has
    42
    never been suggested that Congress’[s] power to regulate foreign commerce could be so
    limited” by “considerations of federalism and state sovereignty.” Japan 
    Line, 441 U.S. at 448
    n.13. The FCC provides Congress broader authority to regulate activity that
    substantially affects foreign commerce. See 
    id. (collecting cases).
    Relatedly, the
    Supreme Court has recognized the need for broader authority because Congress must
    speak with one unified voice abroad. See Bd. of 
    Trustees, 289 U.S. at 59
    .
    FCC analysis thus does not require the distinction between economic and
    noneconomic activity. Courts consequently may aggregate both economic and
    noneconomic activity—and consider congressional findings of substantial effect based on
    aggregation—in determining whether Congress had a rational basis to determine that an
    activity substantially affects foreign commerce and is therefore subject to federal
    regulation.
    5. Constitutionality of § 2423(c)
    Section 2423(c) is constitutional under the third Lopez category as applied to Mr.
    Durham. Under the substantial-effect category, we must determine whether Congress
    had a rational basis for concluding that travel abroad followed by noncommercial, illicit
    sexual conduct with a minor, “taken in the aggregate, substantially affect[s]” foreign
    commerce. 
    Raich, 545 U.S. at 22
    . We conclude that Congress had such a rational basis.
    Congress passed § 2423(c) as an essential part of its broader effort to combat
    international sex trafficking—specifically sex tourism. Under § 2423(b), prosecuting
    individuals who traveled abroad to have illicit sex—whether commercial or
    noncommercial—required intent. Because proving intent was too onerous, Congress
    43
    omitted intent in § 2423(c) to achieve the broader regulatory goals of § 2423 aimed at
    international sex tourism. Congress therefore had a rational basis to determine that travel
    to a foreign country followed by illicit sexual conduct with minors substantially affects
    the international sex tourism industry.
    Section 2423(c)’s (1) legislative history, (2) role in the broader statutory scheme,
    and (3) jurisdictional hook together support the statute’s constitutionality. The Supreme
    Court’s analysis in Gonzales v. Raich lends further support.
    a. Section 2423(c)’s legislative history supports rational basis
    By 2002, Congress had recognized the problem of sex tourism was growing
    despite previous efforts to address it. See H.R. Rep. No. 107-525, at 2 (“[C]hild-sex
    tourism . . . is increasing,” especially in many “developing countries”). For many
    developing countries, sex tourism had become a source of income, and “[b]ecause poor
    countries are often under economic pressure to develop tourism, those governments often
    turn a blind eye towards [the problem of sex tourism] because of the income it produces.”
    
    Id. The legislative
    record contains statements expressing concern that the sex tourism
    industry “support[s] one of the fastest growing areas of international criminal activity.”
    149 Cong. Rec. 7,625 (2003) (statement of Rep. Sensenbrenner).
    The 2003 PROTECT Act sought to stop this problem. § 105, 117 Stat. at 654. It
    added a statutory scheme to dismantle sex tourism. See 
    id. In addition
    to § 2423(c),
    three of the Act’s other provisions also targeted the industry. Section 2423(d) punished
    sex tourism operators and their businesses; § 2423(e) criminalized conspiracies or
    44
    attempts to engage in sex tourism; and § 2423(f) defined commercial acts,
    noncommercial acts, and the production of child pornography as activities of sex tourism.
    One of the PROTECT Act’s critical additions was § 2423(c). This provision
    addressed a problem with one of Congress’s previous attempts to curb sex tourism—
    § 2423(b)’s stringent mens rea requirement. Section 2423(b) required the prosecution to
    show an individual traveled with the “inten[t]” to engage in illicit sexual contact with
    minors, which was “difficult to prove.” Hearings at 25 (statement of Daniel P. Collins,
    Associate Deputy Att’y Gen., U.S. Dep’t of Justice). Section 2423(c) closed this gap; it
    targeted “persons who travel to foreign countries to engage in illegal sexual relations with
    minors” regardless of intent. 149 Cong. Rec. 7,633 (2003) (statement of Rep.
    Sensenbrenner).
    The dissent correctly observes that congressional findings “can inform the
    analysis” but also are “not dispositive.” Dissent Op. at 41. The dissent also accurately
    notes that the PROTECT Act did not contain congressional findings on the impact of
    noncommercial sex on foreign commerce. See 
    id. at 42.
    But “the absence of
    particularized findings does not call into question Congress’[s] authority to legislate.”
    
    Raich, 545 U.S. at 21
    . Courts may look to the legislative history more broadly in
    determining whether Congress had a rational basis to conclude that an activity
    substantially affects foreign commerce. See 
    id. at 22.
    b. Section 2423(c) is an essential part of a broader statutory scheme
    Section 2423(c) not only bolstered § 2423(b), it joined a long lineage of legislation
    aimed at sex trafficking. Beginning with the Act of 1907, the United States banned the
    45
    “importation” of foreign prostitutes into the United States. § 3, 34 Stat. at 899. Congress
    expanded its efforts to end international sex trafficking by passing the Mann Act in 1910
    to prevent interstate trafficking, 36 Stat. 825; the Protection of Children Against Sexual
    Exploitation Act in 1978 to prevent the trafficking of boys as well as girls, § 3, 92 Stat. at
    8; and the Child Sex Abuse and Pornography Act in 1986 to prevent the noncommercial
    sexual exploitation of children, § 5, 100 Stat. at 3511. The 1994 Violent Crime Control
    and Law Enforcement Act, § 160001(g), 108 Stat. at 2037, and the 2003 PROTECT Act,
    § 105, 117 Stat. at 654—adding § 2423(b) and § 2423(c) to 18 U.S.C. § 2423,
    respectively—were Congress’s most recent attempts to combat sex trafficking through
    criminalization of sex tourism.
    The pathway to the enactment of § 2423(c) manifests a purpose to address the
    foreign commerce problem of the international sex trade. Unlike the gun possession
    provision in Lopez, which was “not an essential part of a larger regulation of economic
    
    activity,” 514 U.S. at 561
    , Congress viewed § 2423(c) as a necessary part of the broader
    effort to combat the sex tourism market. It determined that 2423(b)’s gap limited
    18 U.S.C. § 2423’s efficacy. Thus, in criminalizing illicit sexual conduct abroad,
    whether commercial or noncommercial and regardless of intent, Congress determined
    that such activity, in the aggregate, substantially affects foreign commerce. Congress had
    a rational basis to conclude that the conduct § 2423(c) addresses substantially affects
    foreign commerce—in this instance, the international sex trade.
    The dissent argues that “the great bulk of [the long history of federal legislation
    governing interstate and international travel for sex offenses] is irrelevant because it does
    46
    not speak to the specific regulation at issue here.” Dissent Op. at 42. But this history is
    the predicate for showing that § 2423(c) is an essential part of the broader regulatory
    scheme. Although we do not rely on formal legislative findings for this point, we
    properly rely, as have other courts, on the legislative history leading up to and
    including the enactment of § 2423(c). See 
    Raich, 545 U.S. at 10-15
    (discussing drug
    legislation from 1906 to 1970, which “culminated in the passage of” the act
    containing the CSA); Fullilove v. Klutznick, 
    448 U.S. 448
    , 475 (1980) (plurality
    opinion) (stating “[t]he legislative history of the [statute] shows that there was a
    rational basis for Congress to conclude that the [regulated activity] . . . has an effect
    on interstate commerce” and that “Congress could take necessary and proper action
    to remedy the situation”). The legislative history demonstrates that Congress
    regarded § 2423(c) as an essential part of the broader regulation resulting from a long
    history of combatting international sex tourism.19
    19
    The dissent also suggests that there must be congressional findings
    demonstrating that a larger “regulatory scheme could be undercut unless the
    intrastate activity were regulated.” Dissent Op. at 40 (quoting 
    Lopez, 514 U.S. at 561
    ). Because, the dissent contends, Congress made no findings that the “failure to
    control noncommercial illicit sexual conduct would ‘undercut’ [the regulation of
    commercial sex],” 
    id. at 40-41,
    § 2423(c) was not an essential part of the broader
    regulation. We disagree.
    First, as already stated, “the absence of particularized findings does not call
    into question Congress’[s] authority to legislate.” 
    Raich, 545 U.S. at 21
    . The Court
    has never required legislative findings, let alone findings showing that a regulatory
    scheme would be undercut without regulation of a particular activity.
    Second, the legislative history demonstrates that § 2423(c) was an essential
    part of the broader regulatory scheme. The intent requirement in § 2423(b) was
    undercutting sex tourism prosecutions. By shedding the mens rea requirement,
    Congress enabled the prosecution of individuals who travel abroad and have illicit
    sex—whether commercial or noncommercial—with minors. Congress could
    47
    c. Section 2423(c)’s jurisdictional element supports rational basis
    The dissent recognizes that § 2423(c) contains an “express jurisdictional element”
    tying § 2423(c) to foreign commerce. Dissent Op. at 45. In addition to “engag[ing] in
    illicit sexual conduct,” § 2423(c) requires “travel[] in foreign commerce” as an element
    of the offense. 18 U.S.C. § 2423(c). An express element limits the statute’s reach by
    linking the prohibited illicit activity to foreign commerce. See 
    Morrison, 529 U.S. at 611-12
    ; 
    Patton, 451 F.3d at 632-34
    . The dissent properly points out that “[a]
    jurisdictional hook is not, however, a talisman that wards off constitutional challenges.”
    See Dissent Op. at 45 (quoting 
    Patton, 451 F.3d at 632
    ). But § 2423(c)’s jurisdictional
    hook nonetheless points to Congress’s explicitly limiting the statute to “foreign
    commerce” and to having a rational basis for its enactment. Although the presence of a
    jurisdictional element is “neither necessary nor sufficient,” it is “certainly helpful” in
    determining whether “the prohibited activity has a substantial effect on” foreign
    commerce. 
    Patton, 451 F.3d at 632
    .
    d. Raich supports rational basis for § 2423(c)
    The Supreme Court’s 2005 decision in Gonzales v. Raich supports the foregoing
    analysis. After Lopez and Morrison, Raich was the first Supreme Court case to uphold a
    federal statute on interstate commerce grounds.
    The CSA classified marijuana as a Schedule I drug, making its manufacture,
    distribution, or possession a criminal offense. Raich, 545 U.S.at 14; see 21 U.S.C.
    rationally believe that without § 2423(c), these same individuals would continue to
    fuel the international sex tourism market.
    48
    §§ 812(c), 841(a)(1). State law allowed California residents Angel Raich and Diane
    Monson to cultivate or possess marijuana for personal medical purposes. 
    Raich, 545 U.S. at 5
    . They challenged § 841(a)(1) of the CSA, arguing it exceeded congressional
    authority under the ICC as applied to them. 
    Id. at 22;
    see 21 U.S.C. §§ 812(c), 841(a)(1)
    (2000). The Court upheld § 841(a)(1) as applied to Ms. Raich and Ms. Monson, finding
    it was part of a larger regulation of economic activity and that Congress had a rational
    basis to conclude that home-grown marijuana for medical use substantially affected
    interstate commerce. 
    Raich, 545 U.S. at 22
    ; see 21 U.S.C. § 812 (2000) (CSA section
    categorizing controlled substances); 
    id. §§ 821-830
    (CSA sections specifying
    requirements for registering, producing, labeling, packaging, and recordkeeping for
    controlled substances).
    The Court upheld the CSA despite the lack of a congressional finding concerning
    the impact of noncommercial marijuana cultivation on interstate commerce. 
    Raich, 545 U.S. at 21
    . The Court stressed that it need only determine whether Congress had a
    “rational basis” for determining that these activities taken in the aggregate substantially
    affect interstate commerce. 
    Id. at 22.
    It had “no difficulty concluding that Congress had
    a rational basis for believing that failure to regulate the intrastate manufacture and
    possession of marijuana would leave a gaping hole in the CSA.” 
    Id. The Court
    determined that the provision is part of the CSA’s larger regulatory scheme that regulated
    the market for controlled substances. 
    Id. at 15
    , 20-21. Section 841(a)(1) was one part of
    the CSA, which classifies drugs into five schedules, each with a distinct set of controls.
    
    Id. at 13-14.
    The CSA’s purpose is to control the supply of and demand for both legal
    49
    and illegal drugs. See 
    id. at 19.
    Thus, the Court determined that personally cultivated
    marijuana for medical purposes, taken in the aggregate, substantially affected the illicit
    market for drugs, and was subject to regulation under the ICC. 
    Id. at 22,
    28-29.20
    Two aspects of the Raich analysis are noteworthy.
    First, the Court observed that the CSA was the product of decades of legislation.
    Congress “set out to enact legislation that would . . . provide meaningful regulation over
    legitimate sources of drugs to prevent diversion into illegal channels.” 
    Id. at 10.
    Like
    Congress’s early attempts to regulate sex trafficking, Congress attempted to regulate the
    national drug market early on, passing the Pure Food and Drug Act of 1906 and the
    Harrison Narcotics Act of 1914. 
    Id. It also
    attempted to regulate the market for
    20
    We have recently interpreted Raich as supporting congressional “regulation
    of noncommercial, purely intrastate activity that is an essential part of a broader
    regulatory scheme that, as a whole, substantially affects interstate commerce (i.e., has
    a substantial relation to interstate commerce).” 
    PETPO, 852 F.3d at 1002
    . In
    PETPO, we upheld the provisions of the Endangered Species Act (“ESA”) that allow
    the U.S. Fish and Wildlife Service (“FWS”) to promulgate regulations protecting
    threatened or endangered species. 
    Id. at 994.
    Under these provisions, the FWS
    prohibited the “take”—or the harassment, harm, pursuit, hunting, shooting,
    wounding, killing, trapping, capturing, or collecting—of Utah prairie dogs, a purely
    intrastate species, on nonfederal lands. 
    Id. PETPO, an
    organization of property
    owners affected by the regulation, argued that Congress exceeded its authority under
    the ICC in authorizing the FWS to promulgate regulations prohibiting the “take” of
    prairie dogs—a noncommercial activity. 
    Id. at 996.
           We upheld the provisions because, under Raich, they were “an essential part of
    the ESA’s broader regulatory scheme which, in the aggregate, substantially affects
    interstate commerce.” 
    Id. at 1002.
    Even though the regulation protecting prairie
    dogs concerned noncommercial activity, we recognized that Congress had a rational
    basis to conclude that the regulated activity had a substantial relationship to interstate
    commerce. “Congress had a rational basis to believe that providing for the regulation
    of take of purely intrastate species like the Utah prairie dog is essential to the ESA’s
    comprehensive regulatory scheme.” 
    Id. at 1006-07.
    50
    marijuana with the Marihuana Tax Act in 1937. 
    Id. at 11.
    From these piecemeal
    attempts, Congress finally passed the Comprehensive Drug Abuse Prevention and
    Control Act of 1970—which contained the CSA—to regulate the illegal and legal drug
    markets. 
    Id. at 10.
    Congress followed a similar course in passing the PROTECT Act, building on
    previous attempts to regulate the international market for sex trafficking. Beyond
    criminalizing the transport of prostitutes under the Mann Act, for example, the
    PROTECT Act attempted to address sex tourism comprehensively. It also closed gaps by
    targeting sex tourism operators and not requiring intent for travelers who engage in illicit
    sex. Just as legislative lineage supported a rational basis for congressional action in
    Raich, it also does so for § 2423(c).
    Second, the Court in Raich examined the home-grown marijuana provision within
    the broader statute and recognized that it was part of the CSA’s larger scheme to regulate
    commerce. 
    Id. at 23
    (noting the CSA was a “valid statutory scheme” regulating the illicit
    drug market). It was “of no moment” that this larger scheme both envisioned and
    captured some purely intrastate activity. 
    Id. at 22.
    Because § 841(a)(1) was one
    component of a regulatory framework, the Court “refuse[d] to excise individual
    components of that larger scheme.” 
    Id. Thus, the
    Court upheld the CSA’s regulation of
    noncommercial cultivation of medical marijuana as a valid part of a larger scheme to
    regulate the controlled substances market.
    Similarly, § 2423(c) is part of the PROTECT Act’s larger scheme to combat sex
    tourism. Congress passed § 2423(c) as a vital component to regulate the illicit
    51
    international market for sex. The § 2423 provisions work together to curb the trafficking
    and sexual exploitation of minors abroad. Section 2423(a) targets the trafficking of
    minors across state and international borders; section 2423(b) targets those who travel
    abroad with the intent to engage in illicit sexual acts with minors; section 2423(c) targets
    those who travel without intent to engage in such acts; and § 2423(d) targets those who
    operate businesses that facilitate such illicit sexual conduct abroad. Together, the
    provisions curb the supply and demand in the sex tourism industry. That § 2423(c)
    captures intranational, noncommercial activity is “of no moment,” see 
    id. at 22,
    because
    it is a part of a statutory structure aimed at regulating foreign commerce—the
    international sex tourism industry.21
    e. Rational basis standard
    Rational basis is a deferential standard. The dissent mistakenly suggests that
    because the regulated activity must have a substantial effect on commerce and because
    noncommercial sex is noneconomic, such an effect is impossible. See Dissent Op. at 37-
    21
    The Raich Court recognized that Congress exercised its authority under the ICC
    and the Necessary and Proper Clause to pass “comprehensive legislation to regulate” the
    illicit substances market. 
    Raich, 545 U.S. at 22
    . “Congress was acting well within its
    authority to ‘make all Laws which shall be necessary and proper’ to ‘regulate
    Commerce . . . among the several States.’” 
    Id. (quoting U.S.
    Const. art. I, § 8, cl. 3 and
    cl. 18). Because Congress had “a rational basis for believing that failure to regulate the
    intrastate manufacture and possession of marijuana would leave a gaping hole in the
    CSA,” the regulation of noncommercial, intrastate activity—home cultivation and
    possession of medical marijuana—was “of no moment.” 
    Id. The Court
    refused to
    “excise individual components of that larger scheme.” 
    Id. It was
    therefore “necessary
    and proper” under Congress’s ICC power to regulate the noncommercial, intrastate
    activity. 
    Id. Because the
    Government does not rely on the Necessary and Proper Clause
    to defend § 2423(c), we do not address that provision.
    52
    38. The dissent criticizes the government for its failure to show that “noneconomic
    sex abuse will affect the market in commercial sex trafficking,” 
    id. at 38,
    or that the
    “regulation is ‘an essential part’ of the regulation of commercial sex tourism,” 
    id. at 40.
    It demands “data [] that [show] prosecutions of noncommercial child sexual abuse
    reduce the incidence of commercial abuse” because noncommercial sex is not a “fungible
    commodit[y].” Id.22
    But under the proper standard of review, “[w]e ask not whether, as judges, we
    believe the challenged statute has a substantial effect on interstate commerce, but
    whether Congress could reasonably have thought so.” 
    Patton, 451 F.3d at 625
    . As
    the Court emphasized in Raich: “[W]e stress that the task before us is a modest one.
    We need not determine whether respondents’ activities, taken in the aggregate,
    substantially affect interstate commerce in fact, but only whether a ‘rational basis’
    exists for so concluding.” 
    Raich, 545 U.S. at 22
    . Here, the legislative history, the
    overall statutory scheme, and jurisdictional hook all evince that Congress had a
    rational basis for concluding that, in the aggregate, Americans who travel abroad and
    22
    The dissent emphasizes the economic and noneconomic distinction. See
    Dissent Op. at 34 (“The fact that noncommercial nonconsensual sexual activity is not
    economic activity is extremely important, probably dispositive, in determining
    whether it is subject to the third category of regulation of commerce.”). But this
    distinction arose from federalism concerns in the ICC context, and those concerns do
    not apply here.
    Even in the ICC context, the Court has never “adopt[ed] a categorical rule
    against aggregating the effects of any noneconomic activity.” 
    Morrison, 529 U.S. at 613
    . The Court has upheld congressional regulation of noncommercial activity, see
    
    Raich, 541 U.S. at 21-22
    , and this court has upheld laws regulating what appeared to
    be noneconomic activity. See 
    PETPO, 852 F.3d at 1002
    (upholding the protection of
    prairie dogs under the ESA).
    53
    have noncommercial sex with minors substantially affect the international sex
    tourism market.23 Congress determined, after years of experience with the evolving
    legislative framework, that it needed § 2423(c) to complete the package. We cannot
    say this choice was unreasonable.
    6. Legal Landscape
    Both of the circuits that have examined the constitutionality of § 2423(c)’s
    criminalization of noncommercial illicit sexual conduct abroad under the FCC have
    upheld it. See 
    Bollinger, 798 F.3d at 218
    (the Fourth Circuit upholding § 2423(c)
    because of its “demonstrable” effect on foreign commerce); 
    Pendleton, 658 F.3d at 311
    (the Third Circuit upholding § 2423(c) because of its express connection to the channels
    of foreign commerce); see also United States v. Flath, 
    845 F. Supp. 2d 951
    , 956 (E.D.
    Wis. 2012) (upholding under the FCC); United States v. Martinez, 
    599 F. Supp. 2d 784
    ,
    808 (W.D. Tex. 2009) (upholding under the FCC and the necessary and proper clause).
    But see United States v. Al-Maliki, 
    787 F.3d 784
    , 791-92 (6th Cir. 2015) (not deciding the
    issue, but expressing doubt about § 2423(c)’s constitutionality under the FCC).24
    23
    The dissent relies on the three-factor framework laid out in Patton, but
    eschews a holistic analysis. It recognizes that three factors—(1) the activity’s
    relation to commerce, (2) congressional findings, and (3) jurisdictional hook—are
    relevant to our substantial-effect analysis, see Dissent Op. at 35-36, but analyzes
    them separately from each other, see 
    id. at 36-48.
    Here, we consider the legislative
    history, the regulatory scheme, and the jurisdictional hook together in “answer[ing]
    [the] question” of “whether Congress had a rational basis to find that the regulated
    activity, taken in the aggregate, would substantially affect interstate commerce.”
    
    Patton, 451 F.3d at 623
    ; see also 
    Raich, 545 U.S. at 10-11
    , 22-23.
    24
    The Ninth Circuit also has upheld § 2423(c) under the FCC in a challenge to
    the provision’s prohibition of commercial illicit sexual conduct. See Clark, 
    435 F.3d 54
           Two district court opinions in the District of Columbia have held otherwise. See
    United States v. Reed, No. CR 15-188 (APM), 
    2017 WL 3208458
    , at *14 (D.D.C. July
    27, 2017) (unpublished) (finding § 2423(c)’s application to noncommercial conduct
    unconstitutional under the FCC); United States v. Park, 
    297 F. Supp. 3d 170
    , 179 (D.D.C.
    2018) (using Reed, 
    2017 WL 3208458
    , to come to the same conclusion). But, unlike
    here, these cases concerned individuals charged under § 2423(c)’s “residing clause.” See
    18 U.S.C. § 2423(c) (“Any United States citizen . . . who travels in foreign commerce or
    resides, either temporarily or permanently, in a foreign country, and engages in any illicit
    sexual conduct . . . .” (emphasis added)). The district courts lacked a jurisdictional hook
    to “foreign commerce,” which is present in our case. See, e.g., Reed, 
    2017 WL 3208458
    ,
    at *12. Moreover, the district courts emphasized the sexual abuse at issue was
    noneconomic and its connection to international sex tourism was too attenuated to have a
    “substantial effect” on foreign commerce. See, e.g., 
    id. In coming
    to this conclusion,
    they focused on a lack of particularized legislative findings and history. As explained
    above, the Supreme Court has never required “particularized findings,” and such a
    limited focus overlooks the legislative history laid out in this opinion and § 2423(c)’s
    place in a broader regulatory scheme. 
    Raich, 545 U.S. at 21
    ; see also Heart of Atlanta
    Motel, Inc. v. United States, 
    379 U.S. 241
    , 252 (1964) (upholding the Civil Rights Act
    even without congressional findings).
    1100. It also recently interpreted the language of § 2423(c) without addressing its
    constitutionality. See United States v. Pepe, 
    895 F.3d 679
    (9th Cir. 2018).
    55
    7. Conclusion
    In passing § 2423(c), Congress had a rational basis to conclude it was regulating
    activity that substantially affects foreign commerce. In particular, it could reasonably
    decide that foreign travel followed by noncommercial sex with minors—in the
    aggregate—substantially affects the international market for sex tourism. We therefore
    uphold § 2423(c) as applied to Mr. Durham as a permissible exercise of congressional
    authority under the FCC.
    Section 2423(c)’s legislative history, place in the broader regulatory scheme, and
    jurisdictional hook indicate Congress’s rational basis for determining the activity’s
    substantial connection to foreign commerce. In 2002, the congressional sponsors of
    § 2423(c) recognized that the sex tourism industry was expanding and that the
    “growing . . . industry” fueled human sex trafficking, a massive illicit international
    market. 149 Cong. Rec. 7,625 (2003) (statement of Rep. Sensenbrenner). Congress
    attempted to curtail such markets with the PROTECT Act in 2003. Section 2423(c)—and
    its accompanying provisions—target sex tourists and operators, commercial and
    noncommercial acts, and travel with and without intent to engage in illicit sexual acts.
    Specifically, § 2423(c) closed the enforcement gap created by § 2423(b)’s intent
    requirement. Congress had a rational basis to conclude that, without § 2423(c), the
    failure to capture such behavior would substantially affect foreign commerce—here sex
    tourism.
    Thus, under the FCC, Congress permissibly exercised its authority in passing
    § 2423(c).
    56
    B. Issue Two: Brady Claim
    In his supplemental motion for new trial under Federal Rule of Criminal
    Procedure 33, Mr. Durham alleged that the Government suppressed evidence
    favorable to the accused in violation of Brady v. Maryland, 
    373 U.S. 83
    (1963). The
    district court denied the motion, and Mr. Durham appeals the Brady ruling. We
    affirm because Mr. Durham has not shown by a preponderance of the evidence that
    nondisclosure of the evidence prejudiced his case.
    1. Additional Procedural Background
    a. Trial testimony
    At trial, Dr. Alawiya Abdulkadir Mohamed testified about the victims’
    medical records. ROA, Vol. 12 at 1178 (TT 564). In June 2014, Dr. Abdulkadir
    supervised the outpatient clinic in Kenya where the victims were examined. 
    Id. at 1179-80
    (TT 565-66). Although she did not examine the children, she reviewed the
    Post Rape Care (“PRC”) forms prepared by the clinician who did on June 18, 2014.
    
    Id. at 1182-83,
    1188-89 (TT 568-69, 574-75). Dr. Abdulkadir prepared Medical
    Examination Reports based on the PRCs. 
    Id. at 1183
    (TT 569). Her testimony
    included the following:
    Q. [C]an you explain to the jury what the hymen is on a
    female?
    A. Okay. So the hymen is a membrane which covers the
    vagina and it’s -- it doesn’t fully cover the vagina, so
    there’s a portion which is slightly open to allow the
    menstrual flow. So it’s a membrane which is usually
    most people get born with it and it’s usually present in
    kids and -- yes.
    Q. If a hymen is perforated, what does that mean?
    57
    A. Okay. We -- the hymen could be perforated due to
    several reasons. One of them would be due to sexual
    assault. The others would be due to extraneous
    exercises involving the groin region or falling astride,
    like falling on a wall, having bicycle accidents and
    horseback riding. Those are the common things which
    break the hymen.
    
    Id. at 1185-86
    (TT 571-72). She further testified that five of the six girls had a
    perforated hymen and that would not be normal for girls their ages. 
    Id. at 1187-88
    (TT 573-74). On cross-examination Dr. Abdulkadir testified:
    Q. Now, you talked a lot about a perforated hymen?
    A. Yes.
    Q. Now, a hymen -- a hymen can be in very different
    shapes; is that right?
    A. True.
    Q. It can be flat; is that right?
    A. Yes.
    Q. It can be round, some are bigger and some are smaller?
    A. Bigger in terms of?
    Q. Of their size. Some women will have a bigger hymen
    than others?
    A. It’s a membrane, so it’s more thickness than bigger, it’s
    not --
    Q. More thickness?
    A. The dimensions are not three-dimensional.
    Q. If a woman has not started menstruating yet, would her
    hymen -- it’s called non-estrogenized; is that right?
    A. Yes.
    Q. And that means that the hymen is more rigid and hard?
    A. Yes.
    Q. And so that would be the situation for children who
    have not yet hit their menstrual cycle; is that right?
    A. Yes.
    
    Id. at 1198-99
    (TT 584-85); see also 
    id. at 1220-21
    (TT 606-07) (answering in the
    negative when asked if a 7, 6, 13 or 11-year-old should have a perforated hymen).
    58
    Dr. Abdulkadir testified that even if the assaults occurred a month before the
    examinations, the exams were conducted because “[t]he hymen doesn’t come back.
    So we’re looking out for the hymen. It doesn’t regenerate, so --.” 
    Id. at 1214
    (TT
    600), see also 
    id. at 1221
    (TT 607). She agreed that “there’s no way you can be
    certain that Mr. Durham committed the assaults.” 
    Id. at 1215
    (TT 601); see also 
    id. at 1222
    (TT 608).
    Later in the trial, the defense called Lisa Dunson, a sexual assault nurse
    examiner, who was present in the courtroom when Dr. Abdulkadir testified. 
    Id. at 15
    81, 1585 (TT 967, 971). Nurse Dunson testified that all hymens have a hole in
    them, that preadolescent children do not usually have physical injuries following a
    sexual assault, and that hymens have different shapes and sizes. 
    Id. at 15
    94-96 (TT
    980-82). As for the term “perforated hymens,” she testified:
    Q. Now, what about -- what was the term used on the
    medical records as far as the hymen; do you recall?
    A. Yes. They used the word “perforated.”
    Q. And the examiner who conducted -- who viewed the
    children didn’t testify. What in your mind is -- does
    that mean, “perforated hymen”?
    A. Truthfully, I don’t know. We don’t use that term
    anymore. It hasn’t been used since I’ve been doing
    exams, which is since 2003. I think when the general
    population hears the word “perforated,” we think of a
    tear or a hole that’s not supposed to be there, so I don’t
    know what that means because I don’t use that.
    ***
    Q. So “perforated” could mean a tear, it could mean just
    the natural opening of the hymen. We don’t know at
    this point; is that right?
    A. I wouldn’t speculate what that means.
    59
    
    Id. at 15
    96-97 (TT 982-83). She conceded that the term “perforated hymen” might
    be commonly used elsewhere, and that it appears in the Kenyan protocol for sexual
    assault examinations. 
    Id. at 16
    21, 1626 (TT 1007, 1012). Although the term had not
    been used since she started doing examinations in 2003, she said it was once used in
    the United States. 
    Id. at 16
    26 (TT 1012).
    Nurse Dunson testified, contrary to Dr. Abdulkadir, that hymen tissue can
    repair itself. 
    Id. at 15
    98 (TT 984). She had reviewed an article that said “minor
    abrasions and lacerations usually heal within about three to four days.” 
    Id. She said
    that “statistics say that 90 to 95 percent of all children exams, regardless of what the
    disclosure, are normal.” 
    Id. at 15
    99 (TT 985). She also testified that in examinations
    of children who have been sexually assaulted, “there usually isn’t an injury. Children
    are usually not injured.” 
    Id. at 16
    16 (TT 1002). She also agreed that a “positive
    finding” for five of the six children would be unlikely. 
    Id. at 16
    17-18 (TT 1003-04).
    She said that an acute injury of the hymen is from blunt force trauma. 
    Id. at 16
    25
    (TT 1011).
    b. Supplemental motion for new trial
    On October 2, 2015, Mr. Durham moved for leave to file a supplemental
    motion for a new trial, which was granted, and he filed his memorandum in support
    on October 27. Mr. Durham alleged the Government violated his right to due process
    under Brady because the prosecutor in the case, Assistant United States Attorney
    60
    (“AUSA”) Robert Don Gifford, failed to disclose evidence favorable to the accused.
    ROA, Vol. 3 at 505-06.25
    The supplemental motion stemmed from two memoranda that the Oklahoma
    County District Attorney, David Prater, sent to the district court after the trial. On
    September 28, 2015, the court sent them to the parties’ counsel. ROA, Vol. 3 at 812.
    The memoranda recounted telephone conversations on the evening of June 15, 2015,
    the day the prosecution rested its case-in-chief.
    On August 16, 2015, Oklahoma County Assistant District Attorney (“ADA”)
    Gayland Geiger wrote the first memorandum. It described his June 15 telephone
    conversation with AUSA Gifford:
    I asked Gifford about the facts of his case. He said there
    were 5 or 6 or 7 (don’t remember the exact number) of
    female victims ages 6 to 14. All but one of them had a
    perforated hymen. He indicated this evidence was
    presented by the government’s medical witness. . . . A
    reviewing doctor actually testified to the perforated
    hymens. He said as best as they could tell, the sexual
    assault exams were done about 6 weeks after the abuse
    occurred. He said the defense was calling a sexual assault
    expert, and he did not know what the expert would say. . . .
    I told him that I have not heard the term perforated hymen.
    I told him it is very unusual to have physical findings in
    children; that it is extremely unusual to have physical
    findings 6 weeks after the event; that even if there were an
    injury, it would have healed in that amount of time; and,
    that it is extremely unusual and almost unheard of to have
    physical findings in 5 of 6 or 6 of 7 victims. I called
    [Physician Assistant] Donaldson and joined her for a three-
    25
    Mr. Durham also alleged in his initial motion for new trial that the
    Government violated Brady because it suppressed video data of his conversation with
    Ms. Menja, in which he confessed to certain allegations against him. The district
    court rejected this claim, and Mr. Durham has not pursued it on appeal.
    61
    way conversation with Gifford. She told him the same
    things. We together told him that there are legitimate
    medical studies showing even pregnant girls have normal
    exams. Donaldson explained the anatomy and that a
    perforated hymen is a normal finding. . . . I expressed my
    opinion to him that [] he cannot cross examine the defense
    expert in good faith on those issues, because medical
    research and the legitimate medical community share those
    opinions. I encouraged him to instead contact Dr. Brown
    to be a rebuttal witness to use to say even if the African
    exams are incorrect, it still does not mean sexual abuse did
    not occur.
    
    Id. at 813.
    At ADA Geiger’s request, Dr. Ryan Brown, Chair of the Child Protection
    Committee at the University of Oklahoma Children’s Hospital, wrote the second
    memorandum about his discussions with AUSA Gifford on the night of June 15:
    We had discussed what a performed hymen meant to me. I
    had told him that to me, it meant that the hymen had a hole
    in it, which is normal. I didn’t know if that was what the
    African physician had meant by it, but we don’t normally
    use that language to describe hymens here in the US. . . . I
    had also stated that an imperforate hymen, is still normal,
    but is actually not a common finding. He had stated to me
    that the African physician had stated that he had found 5 of
    the 6 young ladies in the case to have perforated hymens
    and that the physician was calling that an abnormal
    finding. I spoke with him that actually it is rare to have
    findings in sexual abuse exams, especially in your
    preadolescent children. I told him that about 95% of the
    time we will have a normal finding, and of the 5%, 2/3 of
    the evidence is found on the clothing or bed. I also
    reiterated that a normal exam does not rule in or rule out a
    sexual encounter. Also, that it would be quite rare for 5
    individuals to have the same findings on exam in regards
    to a sexual assault, unless the perpetrator was using some
    type of instrumentation, I also spoke about how quickly
    findings on exams can heal, IF there were findings to begin
    with. . . . Again I stated that it would be a small chance to
    62
    have abnormal findings on a preadolescent sexual abuse
    exam, and to have multiple children with the same finding,
    other than normal, would be rare. I also stated again that
    time is of the essence and rape exams done after a week
    could be normal even if there was a finding to begin with
    since the tissue heals so quickly.
    
    Id. at 816.
    In his supplemental motion, Mr. Durham argued that AUSA Gifford had failed
    to disclose the information he learned in his June 15, 2015 conversations in violation
    of Brady. In opposition, the Government argued there was no Brady violation
    because the information at issue was available to the defense and because it was not
    material in light of Nurse Dunson’s testimony.
    The district court denied the Brady claim based on the Government’s second
    argument. It first said that, although the information provided by Dr. Brown was
    available from other sources, the fact it came from Dr. Brown was not. But the court
    concluded that the Government’s failure to apprise Mr. Durham of Dr. Brown’s
    statements did not deprive him of a fair trial because of Nurse Dunson’s “vigorous
    opposition” to Dr. Abdulkadir’s testimony. ROA, Vol. 3 at 810.26
    26
    The motion also alleged that AUSA Gifford had failed to correct Dr.
    Abdulkadir’s false testimony in violation of Napue v. Illinois, 
    360 U.S. 264
    (1959).
    ROA, Vol. 3 at 500-04. The district court denied the Napue claim, concluding there
    was no evidence that Dr. Abdulkadir committed perjury rather than testified
    inconsistently with Mr. Durham’s expert, Nurse Dunson. 
    Id. at 808-09.
    On appeal,
    Mr. Durham does not present a Napue argument. He concedes that he “cannot prove
    that Dr. Abdulkadir herself knew [her testimony] was false” and thus that his Napue
    claim is foreclosed by United States v. Garcia, 
    793 F.3d 1194
    (10th Cir. 2015). Aplt.
    Reply Br. at 6 n.1; see 
    Garcia, 793 F.3d at 1207
    (“A Napue violation occurs when
    (1) a government witness committed perjury, (2) the prosecution knew the testimony
    to be false, and (3) the testimony was material.” (emphasis added)); see also United
    63
    2. Analysis
    a. Standard of Review
    “Our review of a Brady claim asserted in the context of a Rule 33 motion for a
    new trial is de novo, with any factual findings reviewed for clear error.” United
    States v. Torres, 
    569 F.3d 1277
    , 1281 (10th Cir. 2009); see United States v. Garcia,
    
    793 F.3d 1194
    , 1205 (10th Cir. 2015). “[W]hether suppressed evidence is material is
    a mixed question of law and fact which we also review de novo.” Douglas v.
    Workman, 
    560 F.3d 1156
    , 1172 (10th Cir. 2009).
    b. Legal Background
    Under Federal Rule of Criminal Procedure 33, “the court may vacate any
    judgment and grant a new trial if the interest of justice so requires.” Mr. Durham’s
    Rule 33 motion was based, in part, on an alleged Brady violation.
    In Brady, the Supreme Court held “that the suppression by the prosecution of
    evidence favorable to an accused upon request violates due process where the
    evidence is material either to guilt or to punishment, irrespective of the good faith or
    bad faith of the 
    prosecution.” 373 U.S. at 87
    . The Court later held that the duty to
    disclose such evidence applies even when the accused has made no request. United
    States v. Agurs, 
    427 U.S. 97
    , 107 (1976). Brady applies to impeachment evidence, or
    evidence affecting witness credibility, “[w]hen the reliability of a given witness may
    well be determinative of guilt or innocence.” Giglio v. United States, 
    405 U.S. 150
    ,
    States v. Caballero, 
    277 F.3d 1235
    , 1244 (10th Cir. 2002) (“Even postulating tension
    between [a witness]’s responses on direct and cross, such inconsistency alone does
    not establish the knowing use of perjured testimony.” (emphasis added)).
    64
    154-55 (1972) (quotations omitted); see also United States v. Bagley, 
    473 U.S. 667
    ,
    676-77 (1985).
    To establish a Brady violation, “[1] [t]he evidence at issue must be favorable
    to the accused, either because it is exculpatory, or because it is impeaching; [2] that
    evidence must have been suppressed by the State, either willfully or inadvertently;
    and [3] prejudice must have ensued.” Strickler v. Greene, 
    527 U.S. 263
    , 281-82
    (1999); see United States v. DeLuna, 
    10 F.3d 1529
    , 1534 (10th Cir. 1993). The
    defense needs to establish these elements by a preponderance of the evidence.
    McCormick v. Parker, 
    821 F.3d 1240
    , 1246 (10th Cir. 2016). In Strickler, the Court
    said the third element concerns “whether petitioner has established the prejudice
    necessary to satisfy the ‘materiality’ 
    inquiry.” 527 U.S. at 282
    . The evidence is
    material and its nondisclosure is prejudicial “only if there is a reasonable probability
    that, had the evidence been disclosed to the defense, the result of the proceeding
    would have been different.” 
    Bagley, 473 U.S. at 682
    ; see also Kyles v. Whitley, 
    514 U.S. 419
    , 433-434 (1995); 
    Garcia, 793 F.3d at 1205
    .
    c. No prejudice for a Brady violation
    The information that AUSA Gifford learned from the June 15 conversations
    was favorable to the defense, and he did not disclose the conversations to defense
    counsel. 27 But even assuming Mr. Durham could show the first two elements of
    27
    In this regard, the concerns of DA Prater and ADA Geiger were well taken.
    See ROA, Vol. 3, at 813-15.
    65
    Brady were met,28 he has not established prejudice because the information was not
    material in light of Nurse Dunson’s testimony. We therefore affirm the district
    court’s denial of Mr. Durham’s Brady motion.
    AUSA Gifford’s June 15, 2015 conversations with ADA Geiger, Ms.
    Donaldson, and Dr. Brown were was not material in light of the trial record. On June
    16, Mr. Durham called Nurse Dunson to testify. She said there are “usually not
    injuries with children” following a sexual assault, ROA, Vol. 12 at 1598 (TT 984),
    that a physical finding was less likely if the exam occurred five days after an assault,
    
    id. at 1597
    (TT 983), that “minor abrasions and lacerations usually heal within about
    three to four days,” 
    id. at 1598
    (TT 984), that “perforated hymen” was an antiquated
    term no longer in use, 
    id. at 1626
    (TT 1012), and that “statistics say that 90 to 95
    percent of all children exams, regardless of what the disclosure, are normal,” 
    id. at 1599
    (TT 985). Nurse Dunson therefore testified to the information AUSA Gifford
    learned during his June 15 conversations, including the rarity of physical findings in
    cases of child sexual assault and that lacerations to the hymen heal quickly. ROA,
    Vol. 3 at 813-15.
    As the district court said, Mr. Durham has not shown prejudice due to “Ms.
    Dunson’s vigorous opposition to Dr. Abdulkadir’s testimony.” ROA, Vol. 3 at 810.
    The jury received the information from Mr. Durham’s own expert, Nurse Dunson.
    28
    The Government argues it did not suppress because the defendant knew or
    could have acquired the information from another source. Aplee. Br. at 22. Due to
    our disposition of the Brady issue on lack of prejudice, we do not address this
    argument.
    66
    She provided testimony that was the same as or comparable to the information from
    Dr. Brown about perforated hymens, the likelihood of findings during sexual abuse
    examinations, that normal findings do not rule out sexual assault, the rarity of the
    same findings in multiple children, and the speed of healing. Compare ROA, Vol. 3
    at 816 with ROA, Vol. 12 at 1595-96, 1598-99, 1616-18, 1626, 1631 (TT 981-82,
    984-85, 1002-04, 1012, 1017).
    Mr. Durham cannot show prejudice because Nurse Dunson rebutted each of
    Dr. Abdulkadir’s points that may otherwise have been impeached by the information
    that AUSA Gifford learned in the June 15 conversations. Indeed, Mr. Durham admits
    on appeal that Nurse Dunson’s testimony “largely rebutted Dr. Abdulkadir’s claims.”
    Aplt. Br. at 23-24. Taking the differences between the experts’ opinions into
    account, we still conclude that there was no Brady violation because Mr. Durham has
    not shown “a reasonable probability that, had [Dr. Brown’s information] been
    disclosed to the defense, the result of the proceeding would have been different.”
    
    Bagley, 473 U.S. at 682
    .
    We therefore affirm the district court’s denial of the part of the supplemental
    motion for a new trial alleging a Brady violation.
    C. Issue Three: Mr. Durham’s Statements about Child Pornography
    and Homosexuality
    Mr. Durham argues that the district court’s admission of his out-of-court
    statements that he had struggled with child pornography and homosexuality violated
    (1) Federal Rule of Evidence 404(b) because the statements were used to show
    67
    propensity to commit the charged offenses, (2) Federal Rule of Evidence 401 because
    the statements were irrelevant, and (3) Federal Rule of Evidence 403 because the
    statements were unfairly prejudicial. Because the district court did not abuse its
    discretion, we affirm.
    1. Standard of Review
    We review the admission of evidence for abuse of discretion “and will not reverse
    if the district court’s ruling falls within the bounds of permissible choice in the
    circumstances and is not arbitrary, capricious or whimsical.” United States v. Willis, 
    826 F.3d 1265
    , 1270 (10th Cir. 2016) (quotations omitted).
    2. Additional Factual Background
    a. Evidence about child pornography and homosexuality
    The prosecution presented evidence at trial about two separate times when Mr.
    Durham said he had struggled with child pornography or homosexuality.
    First, Ms. Wambugu, Ms. Menja, Mr. Mutonga, and Mr. Jeffries testified about
    statements made at the June 13, 2014 meeting at Upendo. They each said that during the
    meeting, Mr. Durham went outside to talk to Ms. Wambugu, ROA, Vol. 12 at 721, 827,
    998, 1132, and that, upon returning with Ms. Wambugu to the sitting room, Mr. Durham
    said he had struggled with child pornography and homosexuality. 
    Id. at 724,
    828, 999.
    According to Ms. Wambugu, Mr. Durham said he could not remember molesting the
    children, but could “only remember . . . he ha[d] been struggling with child pornography
    and homosexuality.” ROA, Vol. 12 at 724 (TT 110). Ms. Menja testified that Mr.
    Durham “said that he needed help because he has been struggling with child pornography
    68
    and homosexuality.” 
    Id. at 828
    (TT 214). Mr. Mutonga testified that Mr. Durham said
    he “needed to apologize, he needed to be forgiven,” and that he “struggled with
    homosexuality and child pornography.” 
    Id. at 1133
    (TT 519). In his testimony, Mr.
    Durham admitted saying at this meeting that he struggled with homosexuality, but denied
    mentioning child pornography. 
    Id. at 18
    48-49 (TT 1234-35).
    Second, the jury was shown the Seagull Confession Videos that were recorded on
    June 17. At the beginning of one of the videos, Mr. Durham stated he could not
    remember what happened. Ms. Menja responded that if Mr. Durham did not have a
    memory of the events and could not describe them, they would “want the police [t]here to
    deal with it first.” Gov’t Exh. 4 at 1:03-1:10. Mr. Durham said, “I’ve told you the truth,
    I’ve told you that I’ve struggled with this my whole life . . . .” 
    id. at 1:32-1:37,
    and
    described a “temptation to touch children and to be with other men,” 
    id. at 1:57-2:01.
    b. District court rulings
    Before trial, Mr. Durham moved to exclude evidence about his alleged struggles
    with “wanting to touch children”29 or “erotic pornography,” ROA, Vol. 2 at 282, and also
    moved to exclude evidence “regarding [his] sexual history and sexual orientation,” 
    id. at 345.
    The district court denied these motions at a pre-trial hearing. On the pornography,
    the Government argued the statement was “inherent as a part of [Mr. Durham’s]
    confession,” and the court seemed to agree. ROA, Vol. 12 at 523. The court admitted
    the statements about homosexuality because “when a defendant is ostensibly explaining
    29
    Although Mr. Durham sought to exclude the statement about a temptation to
    touch children before trial, he does not challenge its admission on appeal.
    69
    what he’s done, that . . . would be very relevant and probative and admissible.” 
    Id. at 531.
    When Ms. Wambugu testified at trial about the June 13 statements, the court asked
    if Mr. Durham would like a limiting instruction to the jury that Mr. Durham was “not on
    trial for child pornography or homosexuality.” 
    Id. at 725
    (TT 111). Defense counsel
    declined, saying he “d[idn’t] see how there c[ould] be any limiting instruction that
    cure[d] [the testimony’s] prejudice,” so none was given. 
    Id. at 725
    -26 (TT 111-12).
    Mr. Durham based his motion for a new trial in part on the admission of the
    evidence about his statements concerning child pornography and homosexuality. See
    ROA, Vol. 3 at 316-324. The district court ruled he was not entitled to a new trial based
    on the admission of the statements. 
    Id. at 785.
    It said the statement about child
    pornography was relevant “because it was offered by Defendant as a justification for the
    behavior of which he was accused,” and found any prejudicial effect of the evidence did
    not substantially outweigh its probative value. ROA, Vol. 3 at 786. As to the statements
    about homosexuality, the court found “that the potential prejudice of admitting
    Defendant’s statements did not outweigh their probative value.” 
    Id. at 785.
    “[D]espite
    the potential for prejudice to Defendant . . . the evidence herein was relevant, largely
    because it was offered by Defendant as some type of explanation or justification when he
    was accused of engaging in inappropriate sexual activity with children at Upendo.” 
    Id. at 785-86.
    70
    3. Legal Background
    a. Rule 404(b)
    Federal Rule of Evidence 404(b) prohibits evidence of a “crime, wrong, or
    other act . . . to prove a person’s character in order to show that on a particular
    occasion the person acted in accordance with the character.”
    “When we apply Rule 404(b), we distinguish between evidence that is
    extrinsic or intrinsic to the charged crime.” United States v. Kupfer, 
    797 F.3d 1233
    ,
    1238 (10th Cir. 2015). Rule 404(b) prohibits evidence of “other acts,” “but this rule
    does not cover evidence that is considered intrinsic” to the charged crime. 
    Id. (quotations omitted).
    Evidence is intrinsic when it is “directly connected to the
    factual circumstances of the crime and provides contextual or background
    information to the jury.” 
    Id. (quotations omitted).
    b. Rules 401 and 402
    Evidence is admissible only if it is relevant. Fed. R. Evid. 402. Evidence is
    relevant if “it has any tendency to make a fact more or less probable than it would be
    without the evidence; and . . . the fact is of consequence in determining the action.” Fed.
    R. Evid. 401.
    c. Rule 403
    Otherwise admissible evidence may be excluded under Rule 403 if its
    “probative value is substantially outweighed by . . . unfair prejudice.” Fed. R. Evid.
    403. “‘Unfair prejudice’ within its context means an undue tendency to suggest [a]
    decision on an improper basis, commonly, though not necessarily, an emotional
    71
    one.” United States v. Silva, 
    889 F.3d 704
    , 712 (10th Cir. 2018) (quoting Fed. R.
    Evid. 403 advisory committee note to 1972 proposed rules). “[A]s to a criminal
    defendant, [it] speaks to the capacity of some concededly relevant evidence to lure
    the factfinder into declaring guilt on a ground different from proof specific to the
    offense charged.” Old Chief v. United States, 
    519 U.S. 172
    , 180 (1997).
    “The district court has considerable discretion in performing the Rule 403
    balancing test, but exclusion of evidence under Rule 403 that is otherwise admissible
    under the other rules is an extraordinary remedy and should be used sparingly.”
    
    Silva, 889 F.3d at 712
    (quotations omitted).
    4. Analysis
    The district court did not abuse its discretion when it determined the challenged
    statements were (1) intrinsic to the charged crimes, (2) relevant, and (3) not unfairly
    prejudicial.
    a. Rule 404(b)
    The district court did not abuse its discretion by holding the statements were
    intrinsic rather than Rule 404(b) evidence.30 Although the district court did not use
    the word “intrinsic,” it viewed the statements as intrinsic to the charged crimes
    because they were part of Mr. Durham’s denials and eventual confession to the
    crimes. See ROA, Vol. 12 at 523, 531; ROA, Vol. 3 at 785-86.
    30
    Although the statements at issue “are party admissions under [Federal Rule
    of Evidence] 801(d) and thus not hearsay, they must nevertheless also be analyzed
    for admissibility under Rule 404(b)” because they reference other acts that could
    have been used as propensity evidence. United States v. Oberle, 
    136 F.3d 1414
    , 1418
    (10th Cir. 1998).
    72
    Mr. Durham made both statements at issue when the Upendo volunteers
    confronted him about the children’s allegations. The statements were intrinsic
    evidence because they provided “contextual or background information” regarding
    his actions when confronted with the allegations against him and his confession at the
    Seagull on June 17. 
    Kupfer, 797 F.3d at 1238
    .
    The fact that the statements were made after the charged conduct had occurred
    does not make them extrinsic. For example, in United States v. Bajoghli, 
    785 F.3d 957
    (4th Cir. 2015), the Fourth Circuit held it was an abuse of discretion for the district court
    to exclude evidence of a defendant’s post-scheme conduct, 
    id. at 966.
    In that case, the
    government sought to introduce evidence that the defendant had halted his fraudulent
    scheme after he was interviewed by law enforcement. 
    Id. at 964.
    The court held this
    evidence was admissible intrinsic evidence, not 404(b) evidence, because it showed the
    defendant’s knowledge and intent to defraud. 
    Id. at 965.
    Although Mr. Durham made
    his statements after the charged conduct, they were nonetheless intrinsic evidence
    because they “bear[] directly” on his response to the allegations against him. 
    Id. at 964
    (alteration and quotations omitted).
    The district court did not abuse its discretion by holding the statements were
    intrinsic evidence and not subject to the Rule 404(b) bar.
    b. Rules 401 and 402
    As intrinsic evidence, the statements satisfied Rule 401’s “any tendency”
    relevance standard. See Daubert v. Merrell Dow Pharm., 509 U.S. 579,587 (1993)
    (calling Rule 401’s standard as “liberal”). In the face of allegations that he had
    73
    molested children and that two of his alleged victims were male, Mr. Durham’s
    statements that he had struggled with both child pornography and homosexuality
    provided context and explanation, making them relevant and admissible under Rules
    401 and 402. Mr. Durham has not presented any persuasive argument on appeal that
    the district court abused its discretion in determining the statements not only
    constituted intrinsic evidence but also met “the minimal relevance requirements of
    Rule 401.” United States v. Spence, 
    721 F.3d 1224
    , 1229 (10th Cir. 2013); see
    United States v. Breton, 
    740 F.3d 1
    , 14 (1st Cir. 2014) (recognizing “the low bar of
    relevancy set out in Rule 401”).
    c. Rule 403
    The district court did not abuse its discretion in admitting the statements over Mr.
    Durham’s Rule 403 challenge.
    As described, the statements were probative as intrinsic to Mr. Durham’s
    explanation for his conduct. The district court acted within its discretion to determine
    that the potential for unfair prejudice did not substantially outweigh the statements’
    probative value.31
    We affirm the district court’s admission of the statements about struggles with
    child pornography and homosexuality.
    31
    We note the district court offered a limiting instruction on this evidence,
    which defense counsel rejected. ROA, Vol. 12 at 725-26 (TT 111-12). The
    instruction likely would have lowered the prejudicial effect of the evidence, and Mr.
    Durham should not now benefit from declining it.
    74
    D. Issue Four: Prosecutorial Misconduct
    Mr. Durham contends that the district court erred when it denied the part of his
    Rule 33 motion for a new trial which alleged that the Government made improper
    propensity statements about his struggle with homosexuality. Aplt. Br. at 34-39. The
    statements occurred during the Government’s cross-examination of Mr. Durham and its
    closing argument. Because Mr. Durham failed to contemporaneously object to the
    alleged improper statements on prosecutorial misconduct grounds, we review for plain
    error. We find none and affirm the district court’s denial of Mr. Durham’s motion for a
    new trial on this issue.
    1. Standard of Review
    “Ordinarily, we review the trial court’s decision to grant or deny a new trial for
    abuse of discretion, and will reverse the denial of a motion for a new trial only if the trial
    court made a clear error of judgment or exceeded the bounds of permissible choice in the
    circumstances.” United States v. Toro-Pelaez, 
    107 F.3d 819
    , 828 (10th Cir. 1997). But
    where the defendant “failed to contemporaneously object regarding the . . . reasons he
    asserts as justification for a new trial[,] . . . we . . . may only reach the issue if we find
    plain error.” 
    Id. “Plain error
    occurs when there is (1) error, (2) that is plain, which (3) affects the
    defendant’s substantial rights, and which (4) seriously affects the fairness, integrity, or
    public reputation of judicial proceedings.” United States v. Fleming, 
    667 F.3d 1098
    ,
    1103 (10th Cir. 2011) (quotations omitted). “To show that an error affected his
    substantial rights, [the defendant] must establish a reasonable probability that, but for the
    75
    error claimed, the result of the proceeding would have been different.” United States v.
    Uscanga-Mora, 
    562 F.3d 1289
    , 1295 (10th Cir. 2009) (quotations omitted). “When
    evaluating allegedly inappropriate remarks of counsel for plain error, we must view the
    remarks in the context of the entire trial.” 
    Fleming, 667 F.3d at 1103
    (quotations
    omitted).
    2. Additional Factual Background
    As described in Issue Three above, the jury heard evidence that Mr. Durham had
    twice stated that he struggled with homosexuality. We now provide additional factual
    background on the two alleged instances in which the prosecution made improper
    propensity arguments relating to these statements.
    a. The Government’s cross-examination of Mr. Durham
    During the cross-examination of Mr. Durham, the prosecutor questioned him
    about his struggle with homosexuality. After replaying part of one of the Seagull
    Confession Videos, the prosecutor asked Mr. Durham: “[W]hat do you struggle with?”
    ROA, Vol. 12 at 1999 (TT 1385). Mr. Durham’s counsel objected to the question on the
    ground that “this is repetitious,” and the trial court sustained the objection. 
    Id. The prosecutor
    continued: “Mr. Durham, you struggle with homosexuality?” 
    Id. Mr. Durham
    answered, “I did, yes,” after which his counsel objected, again because “[i]t’s
    repetitious.” 
    Id. The Court
    again sustained the objection. 
    Id. The prosecution
    resumed
    playing the Seagull Confession Video, and defense counsel “object[ed] to continually
    replaying it after Your Honor has ruled.” 
    Id. The court
    sustained the objection,
    remarking that “[i]t has been played before.” 
    Id. at 2000
    (TT 1386).
    76
    b. The Government’s closing argument
    During rebuttal closing argument, the prosecutor twice referred to Mr. Durham’s
    “life-long struggle with touching children and homosexuality.” 
    Id. at 2087
    (TT 1473),
    2096 (TT 1482).
    First, the prosecutor argued:
    There is always a first victim to a crime, a first time when you
    go to Upendo, long before your mother does, 24 days, a first
    time when you ask to stay at Upendo among the little children
    that you’re going to be with . . . while you have a life-long
    struggle with touching children and homosexuality.
    
    Id. at 2087
    (TT 1473).
    Second, the prosecutor argued:
    [Mr. Durham] insisted on going to Kenya weeks before
    anyone else. He insisted on living at Upendo when he knew
    he had a life-long struggle with touching children and
    homosexuality. He put himself there knowing he couldn’t
    resist, knowing it was all likelihood that he would get what he
    always wanted, and that was to be with children.
    
    Id. at 2096-97
    (TT 1482-83).
    Mr. Durham’s counsel did not object to either of these statements. See ROA, Vol.
    12 at 2087-2103 (TT 1473-89).
    3. Additional Procedural Background
    After the jury rendered its verdict, Mr. Durham filed a motion for new trial on
    various grounds. One ground was that the prosecution had “implied . . . that [his]
    struggles with homosexuality make it more likely that [he] sexually assaulted and
    molested children.” ROA, Vol. 3 at 321.
    77
    The district court denied the motion. In doing so, it did not separately address Mr.
    Durham’s claim that the prosecution had improperly suggested he had a propensity to
    commit the charged conduct. Instead, within its discussion of the admissibility of Mr.
    Durham’s statements about struggling with homosexuality, the court stated that “[t]he
    United States never argued that Defendant engaged in sexual activity with the children
    because he is homosexual, rather the prosecution noted in closing argument that when
    confronted, he proffered an excuse.” 
    Id. at 785.
    32
    4. Legal Background
    “We analyze whether a statement constitutes prosecutorial misconduct using a
    two-step process.” 
    Fleming, 667 F.3d at 1103
    . “First, we determine whether the
    prosecutor’s statements were improper.” 
    Id. (quotations omitted).
    “Second, we
    determine whether the prosecutor’s improper statements were harmless beyond a
    reasonable doubt.” 
    Id. (quotations omitted).
    “The Government generally bears the burden of proving that an improper
    statement is harmless beyond a reasonable doubt.” 
    Id. But “when,
    as here, a defendant
    fails to object to a prosecutor’s statement, reversal is warranted only when: (1) the
    prosecutor’s statement is plainly improper and (2) the defendant demonstrates that the
    improper statement affected his or her substantial rights.” 
    Id. 32 Mr.
    Durham does not contend that the district court did not rule on the
    prosecutorial misconduct ground raised in his motion for a new trial. See Aplt. Br. at
    34-39. Regardless of whether the district court ruled on this issue, the record is
    sufficiently developed to show that any error did not affect Mr. Durham’s substantial
    rights under our plain error standard of review, as we explain below.
    78
    5. Analysis
    Mr. Durham contends that “[t]he Government committed prosecutorial
    misconduct by arguing Mr. Durham was more likely to commit the alleged crimes
    because he struggled with homosexuality and Mr. Durham was irreparably prejudiced.”
    Aplt. Br. at 39. Because, as we explain below, Mr. Durham failed to preserve either of
    the alleged instances of prosecutorial misconduct for appellate review, we review for
    plain error only. See 
    Toro-Pelaez, 107 F.3d at 828
    . We begin and end our analysis at the
    third step of the plain error test—whether the error affected Mr. Durham’s substantial
    rights. We conclude that Mr. Durham has failed to satisfy the substantial rights step, and
    we therefore affirm the district court’s denial of his motion for a new trial.
    a. Preservation
    Mr. Durham failed to preserve either of the alleged instances of prosecutorial
    misconduct for appellate review by contemporaneously objecting on prosecutorial
    misconduct grounds.33 We address each alleged instance of prosecutorial misconduct
    separately.
    i. Alleged misconduct during cross-examination of Mr. Durham
    Although defense counsel contemporaneously objected to the prosecution’s cross-
    examination of Mr. Durham about struggling with homosexuality, defense counsel
    33
    Mr. Durham “submits he properly preserved the [issue of prosecutorial
    misconduct] and that the standard of review is abuse of discretion” because he
    “raised the issue . . . in his motion for new trial.” Aplt. Br. at 34. Our precedent
    forecloses this argument. See 
    Toro-Pelaez, 107 F.3d at 828
    (when the defendant
    “failed to contemporaneously object regarding the . . . reasons he asserts as
    justification for a new trial[,] . . . we . . . may only reach the issue if we find plain
    error”).
    79
    objected on the ground that the questioning was repetitious—not on the ground of
    prosecutorial misconduct for making a propensity argument. See ROA, Vol. 12 at 1999
    (TT 1385). The district court therefore “did not have notice that defense counsel believed
    the prosecutor’s questioning of [Mr. Durham] to be an inappropriate attempt at [making a
    propensity argument] or to rise to the level of prosecutorial misconduct.” United States v.
    Baldridge, 
    559 F.3d 1126
    , 1135 (10th Cir. 2009).34
    ii. Alleged misconduct during closing argument
    The record shows—and Mr. Durham concedes—that defense counsel did not
    contemporaneously object to the prosecution’s references to his struggle with
    homosexuality in its closing argument. See ROA, Vol. 12 at 2087-2103 (TT 1473-89);
    Aplt. Br. at 34 (“Defendant . . . did not contemporaneously object during closing
    argument.”).
    b. Plain error—substantial rights
    Because Mr. Durham failed to preserve either of the alleged instances of
    prosecutorial misconduct for appellate review, we review for plain error only. We find
    no plain error because Mr. Durham has failed to show that the alleged misconduct
    affected his substantial rights. We address each alleged instance of prosecutorial
    misconduct separately.
    34
    Even if we were to conclude that the objections on the ground of
    repetitiousness sufficed to put the district court on notice that defense counsel
    believed the Government was making a propensity argument, Mr. Durham would still
    not be entitled to relief. Our reasons, discussed below, for determining that any error
    in the prosecution’s questioning did not affect Mr. Durham’s substantial rights would
    also persuade us that any error was harmless beyond a reasonable doubt.
    80
    i. Alleged misconduct during cross-examination of Mr. Durham
    Even assuming error in the prosecutor’s references to homosexuality during cross-
    examination of Mr. Durham, any error did not affect Mr. Durham’s substantial rights.
    “To show that an error affected his substantial rights, Mr. [Durham] must establish a
    reasonable probability that, but for the error claimed, the result of the proceeding would
    have been different.” 
    Uscanga-Mora, 562 F.3d at 1295
    (quotations omitted).
    As discussed above, defense counsel objected to the prosecutor’s questioning on
    Mr. Durham’s struggle with homosexuality on the ground of repetitiousness. The district
    court sustained defense counsel’s objections. Moreover, the court’s preliminary
    instructions to the jury at the trial’s outset had included the following: “If an objection is
    sustained, ignore the question.” ROA, Vol. 12 at 623 (TT 9). Additionally, the jury’s
    acquittal of Mr. Durham on several counts, despite the prosecutor’s questions, suggests
    that the jury’s verdict was “based on reason, rather than emotion.” United States v.
    Archuleta, 
    737 F.3d 1287
    , 1296 (10th Circuit 2013). Under these circumstances, Mr.
    Durham has not shown a reasonable probability that, but for the prosecutor’s questions,
    the jury would have rendered a different verdict. See United States v. Lane, 
    883 F.2d 1484
    , 1498 (10th Cir. 1989) (“As a general rule, we presume that juries follow [limiting]
    instructions.”).
    ii. Alleged misconduct during closing argument
    Even assuming error in the prosecutor’s references to homosexuality during
    closing argument, the error did not affect Mr. Durham’s substantial rights. Mr. Durham
    contends otherwise, citing United States v. Schene, 
    543 F.3d 627
    (10th Cir. 2008). Aplt.
    81
    Reply Br. at 14.35 In Schene, this court said that a prosecutor’s question about whether
    the defendant had visited “websites with homosexual themes” was “arguably 
    improper.” 543 F.3d at 641-42
    .
    Mr. Durham’s argument fails because it does not consider the prosecution’s
    remarks “in the context of the entire trial.” 
    Fleming, 667 F.3d at 1103
    (quotations
    omitted). Despite acknowledging the potentially prejudicial impact of the prosecutor’s
    conduct, we held in Schene that, “even assuming, arguendo, that [the defendant]
    preserved this argument for appeal . . . the district court did not abuse its discretion in
    failing to grant a mistrial based on the prosecutorial 
    misconduct.” 543 F.3d at 642
    . We
    reasoned that, “[g]iven the evidence against [the defendant], . . . the alleged prosecutorial
    misconduct was not flagrant enough to influence the jury to convict on grounds other
    than the evidence presented.” 
    Id. (quotations omitted).
    Even more so here under plain error review, when “it is the defendant rather than
    the Government who bears the burden of persuasion with respect to prejudice,” 
    Fleming, 667 F.3d at 1103
    (quotations omitted), relief is not warranted based on the prosecution’s
    closing argument. As summarized above, the Government presented ample independent
    evidence to show that Mr. Durham committed the offenses on which the jury convicted.
    For example, the trial evidence supporting the jury’s verdict included victim testimony
    and detailed written confessions by Mr. Durham. ROA, Vol. 9 at 8, 15, 16; ROA, Vol.
    35
    Mr. Durham’s argument assumes that the jury harbored biases about sexual
    orientation. He has not provided any evidence that it did, but to the extent his
    assumption holds, we nevertheless conclude Mr. Durham has not shown that any
    error affected his substantial rights, as we explain below.
    82
    12 at 658, 1406, 1440, 1458. And again, the jury’s acquittal of Mr. Durham on the
    remaining counts further supports the harmlessness of any improper prosecutorial
    argument. See 
    Archuleta, 737 F.3d at 1296
    . So even if we could read the prosecutor’s
    closing argument as improperly suggesting that Mr. Durham’s struggle with
    homosexuality made him more likely to act on his temptation to touch children, Mr.
    Durham is not entitled to relief on plain error review.
    ****
    Mr. Durham has not shown that the alleged improper prosecutorial statements,
    individually or taken together, affected his substantial rights under the plain error test.
    We therefore affirm the district court’s denial of Mr. Durham’s motion for a new trial on
    grounds of prosecutorial misconduct.
    E. Issue Five: Cellphone Videos Authentication
    Mr. Durham challenges the admission of Ms. Menja’s cellphone-recorded videos
    of his confession as improperly authenticated. Aplt. Br. at 42. He argues the
    “Government did not sufficiently address [his] contention that the recordings had been
    altered.” Aplt. Br. at 45. He contends the videos were admitted in error due to Mr.
    Durham’s “specific showing of irregularities” and inability to inspect the cellphone itself.
    [Id. at 46.] Because Ms. Menja’s testimony laid a sufficient foundation for
    authentication, we find that the district court did not abuse its discretion when it
    admitted her cellphone videos and affirm.
    83
    1. Standard of Review
    Whether the Government laid a sufficient foundation for the videos to be admitted
    at trial is reviewed for abuse of discretion. United States v. Green, 
    175 F.3d 822
    , 829
    (10th Cir. 1999). Abuse of discretion is defined as “an arbitrary, capricious, whimsical,
    or manifestly unreasonable judgment.” United States v. Cardenas, 
    864 F.2d 1528
    , 1530
    (10th Cir. 1989).
    2. Additional Background
    On June 17, 2014, Ms. Menja recorded part of her conversation with Mr. Durham
    at the Seagull restaurant on her cellphone. The Government’s trial exhibits included the
    five Seagull Confession Videos recorded by Ms. Menja that day. See Gov’t Exs. 3-7.
    Each was admitted and played for the jury.36 Videos played in ROA, Vol. 12, 858-870
    (TT 244-56). Ms. Menja initially turned over her cellphone to the Government so that
    investigators could copy the data. ROA, Vol. 12 at 433. The Government made copies
    and returned the phone to her. 
    Id. a. Pre-Trial
    Before trial, Mr. Durham moved in limine to inspect the cellphone used to record
    his statements and to have an expedited chain of custody hearing. ROA, Vol. 1 at 631.
    The court held a hearing on the motion. ROA, Vol. 12 at 427. At the hearing, the
    36
    Gov’t Exh. 3, 1 minute, 49 seconds (preliminary conversation); Gov’t Exh.
    4, 12 minutes 10 seconds (Mr. Durham describing his interactions with various
    children); Gov’t Exh. 5, 29 seconds (Mr. Durham calling his mother to discuss his
    actions); Gov’t Exh. 6, 20 seconds (Mr. Durham writing out his interactions with
    various children); Gov’t Exh. 7, 10 seconds (another video of Mr. Durham writing
    out his interactions with various children.)
    84
    Government explained that it would be providing Mr. Durham a “mirror image” of Ms.
    Menja’s phone, but not the cellphone itself. ROA, Vol. 12 at 433; ROA, Vol. 2 at 543.
    The Government described the mirror image as follows:
    When you make a video with a phone, unbeknownst to the
    person who is filming, images are embedded into the phone
    called LBLs. If you go back to that video and you cut off a
    portion of the recording, a forensic examiner would show
    that those LBLs still exist. More or less, it’s like a
    fingerprint. In this case, the only way to get to that is to
    look at the actual phone. So based upon the defendant’s
    concerns, we asked to receive the phone and we made a
    mirror image. That way, we can return the phone and do a
    forensic review on the computer, it would be just like we
    had her phone.
    ROA, Vol. 12 at 427-28.
    The Government explained that the mirror image would allow defense counsel to
    analyze whether the videos had been altered: “[a forensic examiner] would be able to
    look at the LBLs to make sure there’s no outstanding LBL missing video.” 
    Id. at 429.
    Defense counsel responded that the mirror image would not be sufficient to inspect for
    alterations. 
    Id. at 430.
    The court ordered the Government to turn over the mirror image to defense
    counsel. It denied without prejudice Mr. Durham’s “Motion to Compel Production,
    Inspection and Imaging of Cell Phone and Expedite Chain of Custody Hearing,” allowing
    Mr. Durham to renew the motion if necessary following his counsel’s inspection of the
    mirror image. ROA, Vol. 12 at 435; ROA,Vol. 2 at 40.
    After his forensic expert, Donovan Farrow, analyzed the mirror image, Mr.
    Durham filed a “Renewed Motion to Compel Production, Inspection, and Imaging of Cell
    85
    Phone.” ROA, Vol. 2 at 533.37 In support of the motion, Mr. Farrow submitted an
    affidavit arguing that the mirror image “cannot be considered a true representation of the
    evidence at the time the videos were recorded” and that “[i]t appears the Government is
    attempting to piecemeal the cell phone evidence and only provide Defense Counsel with
    limited information regarding the videos.” 
    Id. at 543.
    More specifically, he opined:
    [A] type of data scrubbing had occurred on some of the video
    files. Data scrubbing is a technique used to erase metadata
    that is related to a file. This technique has to be done by a
    person with knowledge and is not something that can occur
    unintentionally. Thus, this evidence has been compromised
    as it was intentionally tampered with to the point the video’s
    metadata was deleted.
    
    Id. at 544.
    Before the hearing on the renewed motion to compel, the court arranged for a
    meeting between the parties’ forensic experts. ROA, Vol. 12 at 592-596. At that
    meeting, Mr. Farrow requested a “logical image” from the Government, which he later
    received and analyzed. ROA, Vol. 12 at 595.38
    At the pretrial hearing on the renewed motion to compel, Mr. Durham’s counsel
    argued, “[W]e stated last time we were here in court that the metadata had been scrubbed.
    . . . After looking at the logical image, which is just a portion of the cell phone, [Mr.
    Farrow] found that the videos had, in fact, been split up. They had been cut. He can tell
    that from the file names.” ROA, Vol. 12 at 595. The court concluded Mr. Durham could
    37
    Mr. Durham also renewed his motion for an “expedited chain of custody
    hearing.” ROA, Vol. 2 at 533 (capitalization altered).
    38
    Defense counsel described a “logical image” as “a smaller portion of a
    forensic image.” ROA, Vol. 12 at 595.
    86
    call Mr. Farrow as a witness to testify that the videos had been altered, but it declined to
    exclude the videos entirely. ROA, Vol. 12 at 596. The court also noted that the
    Government “will have to lay the proper foundation for the introduction of these videos,
    and, obviously, cross-examination could be fruitful.” ROA, Vol. 12 at 596.
    b. Trial
    At trial, the court overruled Mr. Durham’s contemporaneous objection to
    admission of the Seagull Confession Videos. ROA, Vol. 12 at 857 (TT 243). The
    Government first showed one of the videos during its direct examination of Ms. Menja,
    who had recorded the video on her cellphone. Before showing the video, the
    Government asked Ms. Menja if she had reviewed the cellphone videos on both her
    phone and on a computer. She responded that she had and that the videos were
    “identical.” ROA, Vol. 12 at 856-57 (TT 242-43). The Government then moved to
    admit the cellphone videos. 
    Id. at 857
    (TT 243). Before the court ruled, it asked Ms.
    Menja whether the videos “accurately reflect[ed] [her] memory of what occurred on that
    date.” 
    Id. at 857
    (TT 243). She said that they did, and the court admitted the videos.
    
    Id. During the
    direct examination of Ms. Menja, the Government asked her several
    times whether she manipulated, changed, or edited the footage in any way. ROA, Vol.
    12 at 859, 861, 865 (TT 245, 247, 251). Each time, she responded that she had not. 
    Id. The defense
    neither cross-examined Ms. Menja about alteration of the videos nor called
    87
    Mr. Farrow or any other forensic expert to testify about the Seagull videos.39 ROA, Vol.
    12, at 893-961 (TT 279-347).
    3. Legal Background
    To authenticate evidence for admission at trial, “the proponent must produce
    evidence sufficient to support a finding that the item is what the proponent claims it is.”
    Fed. R. Evid. 901(a).
    “When evidence is unique, readily identifiable and relatively resistant to change,
    the foundation need only consist of testimony that the evidence is what its proponent
    claims.” United States v. Johnson, 
    977 F.2d 1360
    , 1367 (10th Cir. 1992) (quotations
    omitted); see also United States v. McIntyre, 
    836 F.2d 467
    , 470 (10th Cir. 1987)
    (audiotape of statement admissible in trial where witness who heard statement also
    testifies and gives independent support for testimony).
    On the other hand, when evidence “is not readily identifiable and is susceptible to
    alteration by tampering or contamination, the trial court requires a more stringent
    foundation entailing a chain of custody of the item with sufficient completeness to render
    it improbable that the original item has either been exchanged with another or been
    contaminated or tampered with.” 
    Johnson, 977 F.2d at 1367
    (quotations omitted). A
    videotape that has been altered in some form may still be “readily identifiable” and “not
    susceptible to alteration by tampering” for purposes of authentication. See, e.g., United
    States v. Mills, 
    194 F.3d 1108
    , 1112 (10th Cir. 1999) (allowing videotape into evidence,
    39
    On cross-examination, Mr. Durham’s counsel asked Ms. Menja about the
    context of the videos and why some were started or stopped when they were, but not
    about alterations. ROA, Vol. 12, at 893-961.
    88
    finding it “readily identifiable” and “sufficient[ly] complete[] to render it improbable
    [that it had] . . . been contaminated or tampered with,” despite a deletion that did “not
    affect the accuracy of the remaining images”). The trial court “need not rule out every
    possibility that the evidence underwent alteration; it need only find that the reasonable
    probability is that the evidence has not been altered in any material aspect.” 
    Cardenas, 864 F.2d at 1532
    .
    4. Analysis
    The district court did not abuse its discretion in determining there was a sufficient
    foundation supporting the cellphone videos’ authenticity. Ms. Menja testified that she
    had reviewed the videos and that they were a fair and accurate depiction of what she saw.
    ROA, Vol. 12 at 857 (TT 243). That testimony gave the court sufficient basis to
    determine the videos were authentic. See 
    Mills, 194 F.3d at 1112
    (finding no abuse of
    discretion for a video’s admission when the person responsible for creating the video
    confirmed that it accurately depicted what it claimed to depict); see also United States v.
    Cejas, 
    761 F.3d 717
    , 723 (7th Cir. 2014) (finding no error in admitting video that the
    witness testified was a “fair and accurate depiction” of what he saw). Further supporting
    the video’s authenticity was Ms. Menja’s testimony that she had not edited or altered the
    videos in any way. ROA, Vol. 12 at 859, 861, 865 (TT 245, 247, 251).40
    40
    No chain of custody analysis was necessary given that Ms. Menja’s
    testimony provided a foundation for the video, which was “unique, readily
    identifiable and relatively resistant to change.” 
    Cardenas, 864 F.2d at 1531
    . Mr.
    Durham contends that the videos were “easily subject to manipulation” but did not
    choose to present evidence on this point at trial. Aplt. Reply Br. at 16. He otherwise
    does not argue in his briefing why the video was not “readily identifiable.”
    89
    To the extent Mr. Durham believed the videos did not depict what they
    claimed to depict, the court gave him an opportunity to cross-examine Ms. Menja on
    alterations to the videos and to call his forensic expert to testify on them. He chose
    to do neither. See 
    Johnson, 977 F.2d at 1368
    (defense counsel’s failure to cross on
    an authentication issue cuts against an argument to exclude evidence). The district
    court did not abuse its discretion when it admitted the cellphone videos as
    sufficiently authenticated.
    F. Issue Six: Victims’ Medical Records
    Mr. Durham challenges the district court’s admission of the full set of the victims’
    medical records, rather than just a portion of those records, on four grounds: (1) the court
    admitted all of the records when he had requested admission of only part of them (the “P-
    3” records), Aplt. Br. at 47; (2) the additional admitted material lacked authentication,
    Aplt. Br. at 47; (3) the full records included inadmissible “double hearsay,” Aplt. Br. at
    47-48;41 and (4) admitting the full records was unduly prejudicial. As to the last point,
    Mr. Durham alleges the records contained graphic representations that “inflamed the
    Jury’s sympathies for the alleged victims” and contained an entry that one child “was
    41
    Mr. Durham’s hearsay argument in his opening brief consists of two
    sentences: “The PRC Forms and clinician notes contain information relayed by the
    patient or third parties. This constitutes inadmissible double hearsay. See United
    States v. Gwathney, 
    465 F.3d 1133
    , 1141 (10th Cir. 2006).” Aplt. Br. at 47-48. In
    his reply brief, he maintains that a particular victim’s identification of Mr. Durham
    during her examination was “impermissible double hearsay” but contests no other
    specific information in the victims’ medical records. Aplt. Reply Br. at 19. We
    therefore consider only the abuser identification hearsay argument because Mr.
    Durham fails to identify any other information in the medical records he wishes to
    challenge on hearsay grounds.
    90
    defiled by a man named Matthew.” Aplt. Br. at 47-48. Because Mr. Durham invited any
    error, and because he cannot show error, his argument fails under plain error review. We
    affirm the district court’s admission of the full medical records.
    1. Standard of Review
    Mr. Durham failed to object to admission of the records at trial, so the plain-error
    standard applies. He must accordingly show: “(1) error, (2) that is plain, which (3)
    affects the defendant’s substantial rights, and which (4) seriously affects the fairness,
    integrity, or public reputation of judicial proceedings.” United States v. Baldridge, 
    559 F.3d 1126
    , 1135 (10th Cir. 2009). Mr. Durham’s challenge fails at the first element—
    whether the district court erred. We review evidentiary rulings for error under an abuse
    of discretion standard. 
    Willis, 826 F.3d at 1270
    .
    2. Additional Background
    The medical records that the Government provided to Mr. Durham consisted of:
    (1) a Post Rape Care (“PRC”) form; (2) lab requests; (3) clinician notes; and (4) a
    Medical Examination Report, also known as a P-3 form. ROA, Vol. 10a at 28-80. The
    clinician on call filled out the PRC form for the six children examined. ROA, Vol. 12 at
    1182 (TT 568). A supervising physician, Dr. Abdukladir, then reviewed the PRC forms
    and prepared P-3 forms based on that review. ROA, Vol. 12 at 1182-85 (TT 568-71).
    During cross-examination of Dr. Abdulkadir, defense counsel moved for
    admission of a P-3 Form only. See ROA, Vol. 12 at 1202 (moving to admit pages “1
    through 4” of Government’s Exhibit 44); ROA, Vol. 10a at 28 (P-3 form). The
    Government responded by moving to enter the entire exhibit, which included all four
    91
    components described above. ROA, Vol. 12 at 1202 (TT 588). Defense counsel then
    stated: “I would ask that they move to[sic] Exhibits – enter Exhibit 45, 46, 47, 48, and 49
    as well.” ROA, Vol. 12 at 1202 (TT 588). The Court admitted all of the records. 
    Id. Defense counsel
    did not object. 
    Id. 3. Legal
    Background
    a. Invited error
    It is “fundamental that a defendant cannot complain of error which he invited upon
    himself.” United States v. Chavez, 
    229 F.3d 946
    , 952 (10th Cir. 2000) (quotations
    omitted).
    b. Authentication
    To authenticate evidence for admission at trial, “the proponent must produce
    evidence sufficient to support a finding that the item is what the proponent claims it is.”
    Fed. R. Evid. 901(a).
    c. The hearsay rule and pertinent exceptions
    “Hearsay” is a statement that “the declarant does not make while testifying at the
    current trial or hearing” and “a party offers in evidence to prove the truth of the matter
    asserted in the statement.” Fed. R. Evid. 801(c). It is inadmissible unless an exception
    applies. Fed. R. Evid. 802. One such exception is for business records—“records of a
    regularly conducted activity.” Fed. R. Evid. 803(6). “[H]ospital records . . . fit
    conceptually within the long-established exception for business records.” Manocchio v.
    Moran, 
    919 F.2d 770
    , 776 (1st Cir. 1990).
    92
    Another exception to the hearsay rule is for a “statement that: (A) is made for—
    and is reasonably pertinent to—medical diagnosis or treatment; and (B) describes
    medical history; past or present symptoms or sensations; their inception; or their general
    cause.” Fed. R. Evid. 803(4). This court has recognized that “the Fourth, Eighth and
    Ninth Circuits have held that statements made by a child to a physician which identify the
    sexual abuser as a member of the family or household are ‘reasonably pertinent to
    diagnosis or treatment’ and may therefore be admissible [under Rule 803(4)].” United
    States v. Joe, 
    8 F.3d 1488
    , 1494 (10th Cir. 1993). Accepting these holdings as valid, we
    extended their application to cover abuser identifications during medical examinations
    made by adult domestic sexual assault victims. 
    Id. at 1495.
    d. Unfair prejudice
    Under Federal Rule of Evidence 403, “[t]he court may exclude relevant evidence
    if its probative value is substantially outweighed by a danger of . . . unfair prejudice.”
    Fed. R. Evid. 403. The graphic nature of evidence does not alone make it inadmissible.
    See United States v. Naranjo, 
    710 F.2d 1465
    , 1468-69 (10th Cir. 1983) (allowing
    photograph of victim shot in the face because it showed the “particulars of the crime
    scene” and “was not unduly nor designedly inflammatory”).
    4. Analysis
    Mr. Durham’s challenge to the court’s admission of the victims’ full medical
    records fails. Any error was invited, and he cannot show error on any ground he raises
    on appeal. It follows that he cannot show plain error. 
    Baldridge, 559 F.3d at 1135
    .
    93
    At trial, following Mr. Durham’s request to admit a P-3 Form, which was part of
    the medical records in Government Exhibit 44, the Government requested the admission
    of the entire medical record—including the PRC form, lab requests, clinician notes, and
    the Medical Examination Report. ROA, Vol. 12 at 1202 (TT 588). Rather than object,
    Mr. Durham’s counsel requested to move “Exhibit[s] 45, 46, 47, 48, and 49” into
    evidence “as well.” ROA, Vol. 12 at 1202 (TT 588). Those exhibits included entire
    medical records, not just P-3 forms. Mr. Durham thus invited any potential error from
    admitting the records and cannot establish a plain error warranting reversal. See 
    Chavez, 229 F.3d at 952
    (finding no plain error when the appellant invited the complained-of
    error). Although invited error alone is sufficient to reject Mr. Durham’s challenge on
    appeal to admission of this evidence, we also determine there was no error based on any
    of the four grounds Mr. Durham argues.
    First, Mr. Durham argues his initial request to admit only the P-3 form showed
    “counsel’s intent was to admit only a limited portion of the medical records.” Aplt.
    Reply Br. at 17. Even if that were so, counsel switched gears and requested admission of
    the entire records.
    Second, Mr. Durham’s authenticity argument fails in light of Dr. Abdukladir’s
    testimony. See ROA, Vol. 12 at 1179-83 (TT 565-69). She testified that she supervised
    the department where the records were created, reviewed the PRCs when they were filled
    out to make sure they had been properly completed, and reviewed the records before
    testifying. 
    Id. 94 Third,
    there was no hearsay error. Mr. Durham makes no argument about
    admission of the medical records themselves under the business record or some other
    exception to the hearsay rule. The only specific reference in the medical records Mr.
    Durham challenges based on hearsay is one victim’s identification of “Matthew” during
    her examination. That statement, identifying a member of the child’s household as the
    abuser, was admissible under 
    Joe. 8 F.3d at 1494-95
    .42
    Fourth, the court did not abuse its discretion under Fed. R. Evid. 403. Mr.
    Durham does not question the probativeness of the medical records. Mr. Durham
    characterizes the records as including “graphic representations about where the child was
    touched and the purported genital injury,” Aplt. Br. at 47. We have reviewed the
    evidence and conclude the district court’s balancing of the probative value and prejudicial
    effect was reasonable. See 
    Naranjo, 710 F.2d at 1468-69
    (graphic image admissible if
    highly probative and not designedly inflammatory). The records were highly probative
    of the victims’ injuries. The evidence was collected as part of a standardized medical
    examination process and was not “designedly inflammatory.” 
    Id. at 1469.
    42
    Mr. Durham cites United States v. Gwathney, 
    465 F.3d 1133
    , 1141 (10th
    Cir. 2006), to support his “double hearsay” argument. Aplt. Br. at 47-48. In
    Gwathney, we said that “[a]ny information provided by another person, if an outsider
    to the business preparing the record, must itself fall within a hearsay exception to be
    
    admissible.” 465 F.3d at 1141
    . Here, the statement made by the “outsider”—the
    victim identifying the abuser—is admissible under the hearsay exception recognized
    in Federal Rule of Evidence 803(4).
    95
    Because Mr. Durham invited error and has not otherwise shown the court erred,
    we affirm the records’ admission and reject Mr. Durham’s appeal.43
    G. Issue Seven: Substantive Reasonableness of Sentence
    Mr. Durham challenges his 480-month sentence as substantively unreasonable.
    Aplt. Br. at 58-59. He “does not challenge the district court’s procedure in calculating”
    the recommended sentence under the Guidelines. Aplt. Reply Br. at 26. We affirm his
    sentence because he has not shown that the district court abused its discretion in weighing
    the sentencing factors set forth in 18 U.S.C. § 3553(a).
    1. Standard of Review
    We “review the substantive reasonableness of a sentence for abuse of discretion.”
    United States v. Chavez, 
    723 F.3d 1226
    , 1233 (10th Cir. 2013); see also Gall v. United
    States, 
    552 U.S. 38
    , 51 (2007) (“[T]he appellate court should . . . consider the substantive
    reasonableness of the sentence imposed under an abuse-of-discretion standard.”).
    We find no abuse unless the sentence “is arbitrary, capricious, whimsical, or
    manifestly unreasonable.” United States v. Munoz–Nava, 
    524 F.3d 1137
    , 1146 (10th Cir.
    2008) (quotations omitted). “That is to say, we recognize that in many cases there will be
    a range of possible outcomes the facts and law at issue can fairly support; rather than pick
    43
    Mr. Durham raises a new argument in reply that, to the extent his counsel
    invited error, his counsel was ineffective. Aplt. Reply Br. at 21. Because that
    argument was not raised in his opening brief, it is waived. See Silverton Snowmobile
    Club v. U.S. Forest Serv., 
    433 F.3d 772
    , 783 (10th Cir. 2006) (declining to consider
    arguments not raised in opening brief). It would be more appropriate to raise this
    argument through a motion under 28 U.S.C. § 2255. See United States v. Galloway,
    
    56 F.3d 1239
    , 1242 (10th Cir. 1995) (en banc) (“The rule in this circuit . . . is that
    claims of constitutionally ineffective counsel should be brought on collateral review,
    in the first petition filed under 28 U.S.C. § 2255.”).
    96
    and choose among them ourselves, we will defer to the district court’s judgment so long
    as it falls within the realm of . . . rationally available choices.” United States v. McComb,
    
    519 F.3d 1049
    , 1053 (10th Cir. 2007).
    2. Additional Factual Background
    The final PSR calculated a Guidelines sentence of 1,440 months in prison based
    on Mr. Durham’s total offense level and criminal history category. ROA, Vol. 7 at 142.44
    The PSR identified only one factor potentially warranting a downward departure—that
    Mr. Durham was 19 years old when he committed the offenses of conviction. 
    Id. at 145-
    46. The district court adopted the PSR’s calculated Guidelines sentence of 1,440 months.
    
    Id. at 475.45
    The court sentenced Mr. Durham to 480 months in prison, a sentence it
    characterized as a downward variance. ROA, Vol. 3 at 844; ROA, Vol. 7 at 477; ROA,
    44
    The PSR calculated Mr. Durham’s total offense level to be 49 and his
    criminal history category to be I. ROA, Vol. 7 at 135, 136. Under the Guidelines, an
    offense level exceeding 43, the highest offense level reflected in the sentencing table,
    “is to be treated as an offense level of 43.” U.S.S.G. Ch. 5, Pt. A (Sentencing Table),
    Application Note 3. The Guidelines recommend a sentence of “life” for a defendant
    with an offense level of 43, regardless of the criminal history category. See U.S.S.G.
    Ch. 5, Pt. A (Sentencing Table). The probation officer who prepared Mr. Durham’s
    PSR, after consulting with the United States Sentencing Commission, arrived at a
    Guidelines sentence of 1,440 months to be consistent with the cumulative statutory
    maximum sentence for the four counts of conviction. ROA, Vol. 7 at 142 n.3. Under
    these circumstances, the PSR calculated a recommended Guidelines sentence rather
    than a sentence range.
    45
    Based on its finding that Mr. Durham had committed perjury at trial, the
    district court applied a two-level enhancement for obstruction of justice, bringing Mr.
    Durham’s offense level to 51. ROA, Vol. 7 at 475. Because the offense level
    calculated in the PSR already exceeded the maximum offense level of 43, the two-
    level enhancement had no effect on the recommended Guidelines sentence.
    97
    Vol. 13 at 158.46 The court offered the following explanation of its decision at Mr.
    Durham’s sentencing hearing:
    The sentence the Court has selected, I’m satisfied, is
    sufficient but not greater than necessary, when considering
    the sentencing factors set forth in 18 U.S. Code 3553.
    18 U.S. Code 3553 requires the Court to consider these
    factors:
    The nature and circumstance of the offense; and the history
    and characteristics of the defendant.
    In this regard, pursuant to reading the sentencing
    memorandum and what I’ve heard here today, I have
    considered the age of the defendant, the fact he is a first-time
    offender, his potential for the future, his charitable efforts
    prior to this occasion, that this at least appears to be aberrant
    behavior, the defendant has asked for mercy from the
    Court[,] . . . his success in school, and all the other matters
    raised in the defendant’s brief.
    The next factor the Court must consider are [sic] the need for
    the sentence imposed. This includes to reflect the seriousness
    of the offense, to promote respect for the law, and to provide
    just punishment for the offense, to afford adequate deterrence
    to criminal conduct, to protect the public from further crimes
    of the defendant, to provide the defendant with needed
    education or vocational training, medical care, or other
    correctional treatment in the most effective manner.
    The kind of sentence available is number three.
    Finally, the kind of sentences and the sentencing range, which
    has been established. And the sentencing guidelines call for a
    sentence of life in prison.
    46
    The 480-month sentence consists of 360 months on each of the four counts
    of conviction, running partially consecutively and partially concurrently to achieve
    the total sentence of 480 months. ROA, Vol. 3 at 844; ROA, Vol. 13 at 158-59.
    98
    Next, the need to avoid unwarranted sentence disparities
    among defendants with similar records who have been found
    guilty of similar conduct. . . . I read all the cases cited by both
    the defendant and the government. And, actually, I didn’t
    find these particularly helpful. They went all over the lot, and
    circumstances differed from one case to another. There
    obviously wasn’t one that fit exactly with this case, and you
    wouldn’t expect there to be.
    The only time I have had a case of rape . . . I had one sentence
    five or six years ago . . . in which the defendant was
    convicted of raping his 11-year-old niece. He had a prior
    conviction for sexual molestation, and I imposed a sentence
    of 50 years’ incarceration.
    Finally is the need to provide restitution to any victims of the
    offense.
    These were heinous crimes committed on the most vulnerable
    victims. These darling children, who had been abandoned
    and orphaned, looked to the defendant for love and support.
    Instead, one by one they were raped. One was but five years
    old.
    At times he chose to humiliate the children by having one
    watch while he abused or raped another. He was their worst
    nightmare come true.
    Of course, there are other victims, including the children the
    defendant molested, but the counts were dismissed because
    the acts didn’t technically fit the charge.
    And the Upendo home and the people that worked and
    volunteered there, they were trying to help the forsaken. This
    is now how they are known or what they must deal with.
    These violent acts demand a harsh sentence. The victims
    must feel secure that he will not touch them again. However,
    I also believe, when considering everything, there should be
    some light at the end of the tunnel.
    99
    Hopefully, with appropriate treatment and strict supervision
    after release, the defendant can live productively and safely in
    society.
    ROA, Vol. 13 at 156-58.
    3. Legal Background
    A substantive reasonableness sentencing challenge asks us to address “whether the
    length of the sentence is reasonable given all the circumstances of the case in light of the
    factors set forth in 18 U.S.C. § 3553(a).” United States v. Verdin-Garcia, 
    516 F.3d 884
    ,
    895 (10th Cir. 2008) (quotations omitted); see 
    Gall, 552 U.S. at 51
    .47
    47
    Courts must consider the following factors in imposing a sentence:
    (1) the nature and circumstances of the offense and the history
    and characteristics of the defendant;
    (2) the need for the sentence imposed—
    (A) to reflect the seriousness of the offense, to promote
    respect for the law, and to provide just punishment
    for the offense;
    (B) to afford adequate deterrence to criminal conduct;
    (C) to protect the public from further crimes of the
    defendant; and
    (D) to provide the defendant with needed educational
    or vocational training, medical care, or other
    correctional treatment in the most effective
    manner;
    (3) the kinds of sentences available;
    (4) [the applicable Guidelines recommended kind and range
    of sentence];
    (5) [any pertinent Guidelines policy statements];
    (6) the need to avoid unwarranted sentence disparities among
    defendants with similar records who have been found
    guilty of similar conduct; and
    (7) the need to provide restitution to any victims of the
    offense.
    18 U.S.C. § 3553(a).
    100
    When a defendant is sentenced within a properly calculated Guidelines range, the
    sentence “is entitled to a rebuttable presumption of reasonableness.” United States v.
    Kristl, 
    437 F.3d 1050
    , 1054 (10th Cir. 2006) (per curiam). In addition, we have endorsed
    “the logical and unremarkable proposition that ‘a below-guideline sentence is also
    presumptively reasonable against an attack by a defendant claiming that the sentence is
    too high.’” United States v. Balbin-Mesa, 
    643 F.3d 783
    , 788 (10th Cir. 2011) (quoting
    United States v. Liddell, 
    543 F.3d 877
    , 885 (7th Cir. 2008)).
    4. Analysis
    Mr. Durham challenges his 480-month sentence as substantively unreasonable.
    Aplt. Br. at 58-59. Because Mr. Durham “does not challenge the district court’s
    procedure in calculating” the Guidelines sentence, Aplt. Reply Br. at 26, which was
    determined to be 1,440 months, we presume that his sentence is substantively
    reasonable.48 We affirm because Mr. Durham’s arguments fail to overcome the
    presumption that his sentence is substantively reasonable in light of the § 3553(a) factors.
    First, Mr. Durham appears to argue that he should have been sentenced to no more
    than 470 months in prison, citing an online publication by the United States Sentencing
    Commission (the “Commission”) for the proposition that “a life sentence is the
    equivalent of 470 months.” Aplt. Br. at 58. This argument implicates procedural
    reasonableness rather than substantive reasonableness because it relates to the district
    48
    Mr. Durham’s sentence of 480 months is less than the recommended
    Guidelines sentence of 1,440 months, as determined by the district court. Whether
    we characterize Mr. Durham’s sentence as within or below the Guidelines range, it is
    entitled to a presumption of reasonableness. See 
    Kristl, 437 F.3d at 1054
    ; Balbin-
    
    Mesa, 643 F.3d at 788
    .
    101
    court’s calculation of the Guidelines range rather than its weighing of the § 3553(a)
    factors. See 
    Gall, 552 U.S. at 51
    (“failing to calculate (or improperly calculating) the
    Guidelines range” is a procedural error). “To the extent [Mr. Durham] seeks to challenge
    the procedural reasonableness of the district court’s sentencing calculation, . . . any such
    arguments have been waived by [his] failure either to raise th[is] specific objection[]
    below or to make an argument for plain error review on appeal.” United States v.
    DeRusse, 
    859 F.3d 1232
    , 1236 n.1 (10th Cir. 2017).49
    Second, Mr. Durham contends that his sentence is unreasonably high in light of
    the need to avoid unwarranted disparities. See Aplt. Br. at 58-59. This argument also
    lacks merit. At Mr. Durham’s sentencing hearing, the district court stated that it had
    “read all the cases cited by both the defendant and the government [pertaining to the
    disparities factor]” but “didn’t find [them] particularly helpful” because “circumstances
    differed from one case to another.” ROA, Vol. 13 at 157. On appeal, Mr. Durham has
    not challenged the court’s determination that the other cases he presented involved
    dissimilarly situated offenders. See United States v. Franklin, 
    785 F.3d 1365
    , 1372 (10th
    Cir. 2015) (“No two cases are identical, and comparison of an individual sentence with a
    few counsel-selected cases involving other defendants sentenced by other judges is
    49
    In any event, we are not persuaded that the Commission has “state[d] that a
    life sentence is the equivalent of 470 months.” Aplt. Br. at 58. Mr. Durham cites an
    online publication entitled the “Variable Codebook for Individual Offenders.” 
    Id. This publication
    defines the standard codes the Commission applies to the sentencing
    data it gathers, including the code “470,” which denotes life sentences. See generally
    U.S. Sentencing Comm’n, Variable Codebook for Individual Offenders:
    Standardized Research Data Documentation for FY1999-2014 (Rev. Apr. 8, 2015),
    available at https://perma.cc/A8X6-8TTF. Contrary to Mr. Durham’s assertion, the
    publication nowhere equates a life sentence with 470 months in prison.
    102
    almost always useless.” (citation and quotations omitted)). Nor has he advanced any
    reason to question the court’s weighing of the disparities factor. See United States v.
    Barnes, 
    890 F.3d 910
    , 921 (10th Cir. 2018) (“Even if the disparities factor weighs in
    favor of a higher sentence, the district court considered it alongside other factors and the
    facts of this case and did not abuse its discretion in imposing the sentence[] it did.”).
    ****
    Mr. Durham has failed to rebut the presumption that the district court reasonably
    weighed the § 3553(a) factors or to show that its sentencing decision exceeds the bounds
    of permissible choice. We therefore affirm Mr. Durham’s 480-month sentence.
    H. Issue Eight: Cumulative Error
    Finally, Mr. Durham argues that the errors he alleges, taken together, deprived him
    of a fair trial. Aplt. Br. at 59-60. “To analyze cumulative error, we aggregate all the
    errors that we have found to be harmless and determine whether their cumulative effect
    on the outcome of the trial mandates reversal.” United States v. Anaya, 
    727 F.3d 1043
    ,
    1060–61 (10th Cir. 2013) (quotations omitted). In conducting our cumulative error
    analysis, we consider two of Mr. Durham’s claims: (1) the Brady claim,50 and (2) the
    50
    We “include[] [Brady claims] in the cumulative-error calculus if they have
    been individually denied for insufficient prejudice.” Cargle v. Mullin, 
    317 F.3d 1196
    , 1207 (10th Cir. 2003). Here, as discussed above, we held that no Brady
    violation occurred because the withheld evidence lacked materiality, which speaks to
    prejudice. We therefore include the alleged Brady error in our cumulative error
    analysis.
    103
    prosecutorial misconduct claim.51
    “When there are both preserved and unpreserved errors, cumulative-error analysis
    should proceed as follows: First, the preserved errors should be considered as a group
    under harmless-error review. If, cumulatively, they are not harmless, reversal is
    required.” 
    Id. at 1061
    (alterations and quotations omitted). “The only potential preserved
    error is the [alleged Brady error]. Without other errors to aggregate, there can be no
    cumulative harm.” 
    Id. We therefore
    proceed to the next step of our cumulative error
    analysis.
    “If the preserved errors are cumulatively harmless, then the court should consider
    whether those preserved errors, when considered in conjunction with the unpreserved
    errors, are sufficient to overcome the hurdles necessary to establish plain error.” 
    Id. (quotations omitted).
    “That is, we look to whether the combination of the [alleged Brady
    error] and the prosecutor’s statements regarding [Mr. Durham’s struggle with
    homosexuality] affected Mr. [Durham]’s substantial rights or seriously affected the
    fairness, integrity, or public reputation of judicial proceedings.” 
    Id. (alterations and
    quotations omitted).
    Mr. Durham cannot show that the combination of the alleged Brady and
    prosecutorial misconduct errors affected his substantial rights. As discussed above, he
    51
    In our above discussion of the prosecutorial misconduct claim, we “did not
    determine whether [the] alleged errors constituted actual errors but instead concluded
    that any potential errors did not merit reversal because they did not affect the
    outcome of Mr. [Durham’s] case.” 
    Anaya, 727 F.3d at 1061
    . “For the purposes of
    cumulative error analysis, we assume without deciding that these alleged errors were
    errors and proceed accordingly.” 
    Id. 104 suffered
    minimal (if any) prejudice from the alleged Brady error because defense
    counsel—through Nurse Dunson—presented an effective rebuttal to Dr. Abdulkadir’s
    testimony based on information that was substantially the same as the withheld evidence.
    Moreover, the evidence of Mr. Durham’s guilt was strong. For example, the trial
    evidence supporting the jury’s verdict included victim testimony and detailed written
    confessions by Mr. Durham. ROA, Vol. 9 at 8, 15, 16; ROA, Vol. 12 at 658, 1406, 1440,
    1458. “Consequently, even if we aggregate the[] alleged [Brady and prosecutorial
    misconduct] errors, there is no cumulative error.” 
    Anaya, 727 F.3d at 1061
    .
    III. CONCLUSION
    We affirm Mr. Durham’s convictions and sentence.
    105
    16-6075, United States v. Durham
    HARTZ, Circuit Judge, dissenting.
    In 2014, Defendant, 19 years old at the time, made his fourth missionary trip from
    the United States to Kenya to volunteer at a home for impoverished children. A jury
    acquitted him of traveling with the intent to engage in illicit sexual conduct. But he did
    engage in illicit sexual conduct after his travel to Kenya. While living at the home, he
    sexually assaulted a number of the boys and girls he was supposed to be helping. Kenyan
    police said they could not arrest him, and he was permitted to return to the United States.
    A federal jury convicted him of the offenses he committed after he arrived in Kenya.
    Defendant’s offenses were horrific. The only question is whether the United
    States could properly prosecute him. The government asserts that Congress had the
    authority to criminalize Defendant’s behavior under the Constitution’s Foreign
    Commerce Clause because such conduct has a substantial effect on foreign commerce.
    The panel majority agrees. I respectfully dissent.
    The only foreign “commerce” identified by the government is commercial sex
    trafficking of children. I do not dispute that such trafficking is within the purview of the
    Foreign Commerce Clause.1 But (1) there is no evidence in this case of any commercial
    sexual activity, (2) I fail to see how conduct like that of Defendant has any impact on
    commercial sexual activity, and (3) no one has presented to this court any evidence of
    1
    Congress may also have authority over such trafficking under the Treaty Clause,
    because this country has ratified the Optional Protocol to the Convention on the Rights of
    the Child regarding the Sale of Children, Child Prostitution and Child Pornography. But
    the government has not relied on the Treaty Clause in this case and the Optional Protocol
    addresses only commercial activity.
    such a connection. If Congress has authority under the Foreign Commerce Clause to
    criminalize Defendant’s actions, it has power to criminalize any conduct by Americans
    abroad.
    In my view, the Foreign Commerce Clause does not authorize Congress to
    prohibit noncommercial sexual assaults, no matter how heinous, committed by
    Americans abroad who formed the intent to commit the acts after arriving abroad. The
    Interstate Commerce Clause would not permit Congress to prohibit noncommercial
    sexual assaults within a State, even if the perpetrator had traveled from another State, so
    long as the perpetrator did not form the intent to commit the act before arriving in the
    State where the crime was perpetrated. The majority suggests that even if the Interstate
    Commerce Clause would not authorize the domestic statute, a statute governing conduct
    abroad would be valid under the Foreign Commerce Clause because it conveys more
    expansive power than does the Interstate Commerce Clause and the Foreign Commerce
    Clause is not limited by concerns about state sovereignty. But these suggestions are not
    persuasive. The limits on congressional authority under the Interstate Commerce Clause
    are based on the Supreme Court’s understanding of what it means to regulate commerce
    and the understanding that provisions of a constitution creating a government of limited
    power should not be interpreted in a way that would confer general police power.
    Although federal power under the Foreign Commerce Clause exceeds that under the
    Interstate Commerce Clause in some respects—in particular, the Foreign Commerce
    Clause restricts state regulation of foreign commerce because of the need for this country
    2
    to speak with one voice in foreign affairs—this additional power is irrelevant in the
    present context.
    This dissent will travel much of the same ground as the panel opinion. But, as
    might be expected, my description of the terrain will be somewhat different.
    I.      The Charge
    Defendant was convicted under 18 U.S.C. § 2423(c), which is part of the
    Prosecutorial Remedies and Other Tools to End the Exploitation of Children Today Act
    (PROTECT Act) enacted in 2003. Section 105 of the Act, entitled “Penalties Against
    Sex Tourism,” amended § 2423 to add a subsection (b) entitled “Travel with intent to
    engage in illicit sexual conduct”2 and a subsection (c) entitled “Engaging in illicit sexual
    conduct in foreign places.”3 In subsection (f) it defines illicit sexual conduct to include
    commercial sex acts with persons under 18, production of child pornography, and sexual
    2
    Subsection (b) states:
    Travel with intent to engage in illicit sexual conduct.--A person who
    travels in interstate commerce or travels into the United States, or a United
    States citizen or an alien admitted for permanent residence in the United
    States who travels in foreign commerce, for the purpose of engaging in any
    illicit sexual conduct with another person shall be fined under this title or
    imprisoned not more than 30 years, or both.
    This subsection replaced a somewhat narrower version in the Violent Crime
    Control and Law Enforcement Act of 1994, Pub. L. No. 103-322, 108 Stat. 1796.
    3
    Subsection (c) states:
    Engaging in illicit sexual conduct in foreign places.--Any United
    States citizen or alien admitted for permanent residence who travels in
    foreign commerce or resides, either temporarily or permanently, in a
    foreign country, and engages in any illicit sexual conduct with another
    person shall be fined under this title or imprisoned not more than 30 years,
    or both.
    3
    acts with persons under 18 that would violate chapter 109A of the federal criminal code if
    committed in federal territorial jurisdiction.4 The jury found that Defendant engaged in
    conduct described in Chapter 109A. He was not charged with committing any
    commercial sex act, which is defined in 18 U.S.C. § 1591 as “any sex act, on account of
    which anything of value is given to or received by any person.” And he was acquitted of
    a charge under § 2423(b), which requires that the defendant “travel[] in foreign
    commerce, for the purpose of engaging in any illicit sexual conduct.”
    The question before the court is whether the power to regulate commerce with
    foreign nations includes the power to punish Americans who traveled to a foreign nation
    and then, in what was not a commercial sex act, decided to and did molest a child there.
    To answer the question requires a deep dive into the Foreign Commerce Clause.
    II.    The Commerce Clause
    The Constitution grants Congress the power “[t]o regulate Commerce with foreign
    Nations, and among the several States, and with the Indian Tribes.” U.S. Const. art.1,
    § 8, cl. 3. Almost two centuries ago Chief Justice Marshall noted the commonality of the
    4
    Subsection (f) states:
    Definition.--As used in this section, the term “illicit sexual conduct”
    means-
    (1) a sexual act (as defined in section 2246) with a person under 18 years of
    age that would be in violation of chapter 109A if the sexual act occurred in
    the special maritime and territorial jurisdiction of the United States;
    (2) any commercial sex act (as defined in section 1591) with a person under
    18 years of age; or
    (3) production of child pornography (as defined in section 256(8)).
    4
    three clauses within the Commerce Clause—the Foreign Commerce Clause, the Interstate
    Commerce Clause, and the Indian Commerce Clause—in an opinion construing the
    meaning of the Interstate Commerce Clause. He wrote, “It has been truly said, that
    commerce, as the word is used in the constitution, is a unit, every part of which is
    indicated by the term.” Gibbons v. Ogden, 
    22 U.S. 1
    , 194 (1824). Having previously
    stated the accepted meaning of commerce in the context of international trade, he
    concluded that “the word . . . must carry the same meaning throughout the sentence, and
    remain a unit, unless there be some plain intelligible cause which alters it.” 
    Id. I would
    infer that the same proposition applies to the word regulate in the Clause. Thus, when
    interpreting the Foreign Commerce Clause to resolve this case, one can look to Supreme
    Court doctrine under the other commerce clauses, while recognizing that there may well
    be “plain intelligible cause[s]” that require differentiation among the clauses. I begin
    with a brief explanation of why I think that doctrine under the Indian Commerce Clause
    teaches little about how to interpret the Foreign Commerce Clause in the context of this
    case, and then I compare the Foreign Commerce Clause and the Interstate Commerce
    Clause.
    A. The Indian Commerce Clause
    The constitutional provision containing the Interstate Commerce Clause and the
    Foreign Commerce Clause also grants congressional power “[t]o regulate Commerce . . .
    with the Indian Tribes.” U.S. Const. art. 1, § 8, cl. 3. The Supreme Court has described
    the federal power “to legislate in respect to Indian tribes . . . as plenary and exclusive.”
    United States v. Lara, 
    541 U.S. 193
    , 200 (2004) (internal quotation marks omitted). That
    5
    plenary power has been exercised so far as to impose federal criminal law within Indian
    territory. See, e.g., 18 U.S.C. § 1153 (major crimes by Indians committed in Indian
    country). Is similar authority conveyed under the Foreign Commerce Clause? After all,
    at first glance the Indian Commerce Clause would appear to be a close relative of the
    Foreign Commerce Clause. The relationship between this nation and Indian tribes has
    much in common with the relationship between this nation and foreign nations. At the
    time of the Founding (and long after), the tribes were treated as sovereignties with which
    this country entered into treaties.
    On closer inspection, however, the comparison cannot be sustained. Although the
    Indian Commerce Clause was juxtaposed with the other two commerce clauses, it was a
    late add-on at the constitutional convention, see Albert S. Abel, The Commerce Clause in
    the Constitutional Convention and in Contemporary Comment, 
    25 Minn. L
    . Rev. 432,
    467 (1941) (Abel) (the clauses granting the other two commerce powers “had been
    published by the committee of detail two weeks . . . before the subject of the Indian trade
    was introduced on the floor of the convention”); and, more importantly, the Indian-
    commerce power was a special subject never discussed in relation to the other two
    powers, see 
    id. at 468
    (“Whatever regulation of commerce might mean in connection
    with transactions with the Indians, it was so distinct and specialized a subject [at the
    Convention] as to afford no basis for argument as to the meaning of the rest of the
    clause.”).
    Moreover, congressional power over Indian tribes does not derive just from the
    Commerce Clause. As additional sources of “plenary and exclusive” power with respect
    6
    to Indian tribes, which have been described by the Court as “dependent sovereign[s]” that
    are not States, 
    Lara, 541 U.S. at 203
    (emphasis added), the Supreme Court has identified
    the Treaty Clause, the Property Clause, and “preconstitutional powers necessarily
    inherent in any Federal Government, namely, powers that this Court has described as
    ‘necessary concomitants of nationality,’” 
    id. at 200–01.
    And it has pointed to the federal
    government’s assumption of “guardian-ward” status with respect to Indian Tribes as a
    source for Congress’s “plenary power . . . to deal with the special problems of Indians.”
    Morton v. Mancari, 
    417 U.S. 535
    , 551 (1974). Given this unique status of Indians in our
    constitutional system, I think that one can learn very little about Foreign Commerce
    Clause power over Americans in foreign nations (the situation presented in this appeal)
    by examining congressional authority in Indian country.
    B. The Interstate Commerce Clause
    The component of the Commerce Clause that has bred the most Supreme Court
    doctrine is the Interstate Commerce Clause. Although, as Chief Justice Marshall
    suggested, special considerations pertinent to each clause preclude mechanical
    application to one clause of doctrine regarding another, I first consider interstate-
    commerce doctrine and then address what, if any, adjustments are needed.
    I begin with propositions regarding interstate commerce that are derived from
    notions of international commerce. Chief Justice Marshall’s description of commerce
    was adopted by Chief Justice Rehnquist in United States v. Lopez, 
    514 U.S. 549
    (1995):
    “‘Commerce, undoubtedly, is traffic, but it is something more: it is intercourse. It
    describes the commercial intercourse between nations, and parts of nations, in all its
    7
    branches, and is regulated by prescribing rules for carrying on that intercourse,’” 
    id. at 553
    (quoting 
    Gibbons, 22 U.S. at 189
    –90). But “limitations on the commerce power are
    inherent in the very language of the Commerce Clause.” 
    Id. Again quoting
    Chief Justice
    Marshall:
    It is not intended to say that these words comprehend that
    commerce, which is completely internal, which is carried on between man
    and man in a State, or between different parts of the same State, and which
    does not extend to or affect other States. Such a power would be
    inconvenient, and is certainly unnecessary.
    . . . The enumeration presupposes something not enumerated; and
    that something, if I regard the language, or the subject of the sentence, must
    be the exclusively internal commerce of a State.
    Id. (quoting 
    Gibbons, 22 U.S. at 194
    –95). In recognition of these limitations, the
    Supreme Court has identified “three categories of regulations permitted by the Interstate
    Commerce Clause: (1) regulation of “‘use of the channels of interstate commerce’”; (2)
    regulation of “‘instrumentalities of interstate commerce, or persons or things in interstate
    commerce’”; and (3) regulation of “‘activities that substantially affect interstate
    commerce.’” People for Ethical Treatment of Prop. Owners v. United States Fish &
    Wildlife Serv., 
    852 F.3d 990
    , 1000 (10th Cir. 2017) (quoting 
    Lopez, 514 U.S. at 558
    –59).
    Under the first category Congress can bar a class of goods or people from the
    channels of commerce because they are deemed to be tainted by “immoral [or] injurious
    uses.” United States v. Patton, 
    451 F.3d 615
    , 621 (10th Cir. 2006). Thus, Congress can
    ban the interstate transportation of kidnapped persons or stolen goods, see Perez v.
    United States, 
    402 U.S. 146
    , 150 (1971); of women for the purpose of prostitution, see
    Caminetti v. United States, 
    242 U.S. 470
    , 491–92 (1917); of plural wives for the purpose
    8
    of polygamy, see Cleveland v. United States, 
    329 U.S. 14
    , 18 (1946); of lottery tickets,
    see Champion v. Aims, 
    188 U.S. 321
    , 354–55 (1903); or of goods produced by underpaid
    workers, see United States v. Darby, 
    312 U.S. 100
    , 112–14 (1941). These cases illustrate
    that this regulatory authority is not limited to legislation targeting commercial activities.
    See Heart of Atlanta Motel, Inc. v. United States, 
    379 U.S. 241
    , 256 (1964).
    Under the second category Congress can regulate “the means of interstate
    commerce”—such as ships, railroads, airplanes, and the telegraph; can regulate
    “intrastate activities that threaten these instrumentalities”; and can protect “the persons or
    things that the instrumentalities are moving.” 
    Patton, 451 F.3d at 622
    . For example,
    Congress can ban the destruction of aircraft or theft from interstate shipments. See 
    Perez, 402 U.S. at 150
    .
    Under the third category Congress can regulate activities, even intrastate and
    noncommercial activities, if “Congress ha[s] a rational basis to find that the regulated
    activity, taken in the aggregate, would substantially affect interstate commerce.” 
    Patton, 451 F.3d at 623
    . This authority permits Congress to restrict a farmer’s production of
    wheat for his own use when the restriction’s purpose is to boost the price of wheat in
    commerce. See Wickard v. Filburn, 
    317 U.S. 111
    , 127–29 (1942); 
    id. at 115
    (the statute
    was designed “to control the volume [of wheat] moving in interstate and foreign
    commerce in order to avoid surpluses and shortages,” thereby controlling the price). This
    authority also permits Congress to control marijuana in national commerce by barring the
    noncommercial cultivation, possession, and use of marijuana for personal medical
    purposes. See Gonzales v. Raich, 
    545 U.S. 1
    , 25–33 (2005). To determine whether a
    9
    statute is authorized under this category, courts consider (1) whether the regulated
    activity is commercial or economic; (2) the relation of the regulated activity to interstate
    commerce; (3) congressional findings about the effects of the regulated activity on
    commerce; and (4) whether the statute is limited to activities having an explicit
    connection to interstate commerce—a so-called jurisdictional hook. See 
    Patton, 451 F.3d at 624
    , 626, 630, 632.
    When the regulated activity is commercial, the regulation is generally permissible,
    given how integrated our national economy is. See 
    id. at 623.
    Otherwise, “the last three
    factors are significant.” 
    Id. at 624.
    Because almost any human activity could be said to
    have some effect on commerce, the Supreme Court has carefully examined the
    relationship of the regulated activity to commerce to be sure that the Commerce Clause
    power is not rendered so expansive as to supersede all the other grants of power under the
    Constitution. In particular, an effect cannot be considered “substantial” if inclusion of
    such effects would as a practical matter confer a plenary police power, contrary to the
    notion that the Constitution established a government of limited powers. In United States
    v. 
    Lopez, 514 U.S. at 549
    , the Court invalidated a federal statute prohibiting possession of
    a firearm in a school zone, despite arguments that such possession may result in violent
    crime, which can affect the national economy (1) because the costs imposed are spread
    throughout the population, (2) because fear of violence deters individuals from traveling
    to unsafe areas, and (3) because the threat to the educational system will reduce the
    productivity of the citizenry. See 
    id. at 56
    7–68 (to expand interstate-commerce power to
    encompass the statute “would require us to conclude that the Constitution’s enumeration
    10
    of powers does not presuppose something not enumerated, and that there never will be a
    distinction between what is truly national and what is truly local” (citation omitted)).
    And in United States v. Morrison, 
    529 U.S. 598
    (2000), the Court invalidated a federal
    civil remedy for the victims of gender-motivated crimes of violence, rejecting arguments
    that gender-motivated violence affects interstate commerce because it can deter interstate
    travel, engaging in interstate business, etc. See 
    id. at 617–18
    (“The Constitution requires
    a distinction between what is truly national and what is truly local . . . . The regulation
    and punishment of intrastate violence that is not directed at the instrumentalities,
    channels, or goods involved in interstate commerce has always been the province of the
    States.”). The problem with the statutes in Lopez and Morrison was not that it was
    irrational to think that the regulated activities would affect commerce, but that the effect
    was so indirect—and therefore not “substantial”—that to uphold the statute would be to
    uphold unlimited Commerce Clause power. See 
    Patton, 451 F.3d at 629
    (Lopez and
    Morrison rejected the government’s arguments “largely on the ground that, if accepted,
    similar effects could be invoked in every case, and the Commerce Clause would become,
    in effect, a grant of general governing authority”).
    It is important to keep in mind this limitation on the third category of regulation
    under the Commerce Clause—the regulation of activities that substantially affect
    interstate commerce – when considering the scope of the first two categories—(1) the
    regulation of the use of the channels of commerce and (2) the regulation of the
    instrumentalities of commerce and persons or things in interstate commerce. The first
    two categories are qualitatively different from the third. “The first two categories are
    11
    self-evident, since they are the ingredients of interstate commerce itself.” 
    Raich, 545 U.S. at 34
    (Scalia, J., concurring). “[A]ctivities that substantially affect interstate
    commerce [, however,] are not themselves part of interstate commerce.” 
    Id. Regulation in
    the first two categories can be upheld just by identifying what is being regulated – the
    use of the channels of interstate commerce, or instrumentalities of interstate commerce,
    or persons or things in interstate commerce. But determining the propriety of regulation
    under the third category requires more. The courts must determine whether the activity
    being regulated has a causal connection to interstate commerce that can properly be
    deemed “substantial.” An improper expansion of either of the first two categories to
    encompass regulation that properly belongs within the third category therefore would
    evade the constitutional constraints imposed on the third category of regulation. For
    example, this court has said that under the channels category, “Congress regulates not
    conduct related to interstate commerce but rather interstate commerce itself, barring from
    the channels of interstate commerce a class of goods or people”; and the court described
    that category of regulation as being “confined to statutes that regulate interstate
    transportation itself, not manufacture before shipment or use after shipment.” 
    Patton, 451 F.3d at 621
    . The court concluded that “[a] prohibition on the mere intrastate
    possession of body armor cannot be upheld under Congress’s power to regulate the
    channels of interstate commerce.” 
    Id. Finally, one
    aspect of the Supreme Court’s three-part test is often overlooked. The
    division of interstate-commerce regulation into three categories is less a policy matter
    than it is definitional. To my knowledge, no one has suggested that there is some other
    12
    type of possible regulation outside of those categories. Controversy concerns only
    whether one of those types of regulation is permitted at all by the Constitution, see Nat’l
    Fed’n of Indep. Bus. v. Sebelius, 
    567 U.S. 132
    , 2677 (Thomas, J., dissenting) (stating that
    there is no constitutional power to regulate activity simply because it has a “substantial
    effect” on commerce), or what is the proper scope of one of the categories (such as the
    question of how substantial the effect on commerce must be).
    C. The Foreign Commerce Clause
    I next consider how much of this Interstate Commerce Clause doctrine translates
    to the Foreign Commerce Clause. How much of the doctrine should be carried over and
    how much is not applicable because of some special consideration—that is, in the words
    of 
    Ogden, 22 U.S. at 194
    , because of some “plain intelligible cause”? In particular, how
    should one analyze congressional authority under the Foreign Commerce Clause over
    conduct of Americans abroad, as in the case before us?
    The critical question is when, if ever, the terms commerce and regulate have a
    different meaning under the Foreign Commerce Clause than they do under the Interstate
    Commerce Clause. As previously noted, Chief Justice Marshall indicated the general
    rule that they are understood as having the same meaning in the foreign and domestic
    context, saying: “Commerce, undoubtedly, is traffic, but it is something more: it is
    intercourse. It describes the commercial intercourse between nations, and parts of
    nations, in all its branches, and is regulated by prescribing rules for carrying on that
    intercourse.” 
    Gibbons, 22 U.S. at 189
    –90. Unfortunately, however, there are no
    13
    Supreme Court opinions on whether the terms have distinct meetings in the context of
    regulation of the conduct of Americans abroad.
    The Court’s only decisions on the Foreign Commerce Clause have concerned the
    scope of the Clause with respect to conduct within the borders of the United States and,
    consequently, the relative powers of the federal and state governments under the Clause.
    Typical of the early opinions interpreting the Clause, in Board of Trustees of University
    of Illinois v. United States, 
    289 U.S. 48
    , 56 (1933), the Court rejected a claim that a
    university could not be required to pay customs duties on imported scientific apparatus
    because the school was an instrumentality of the State. See 
    id. at 56
    –59. The Court
    emphasized the preeminence of federal power over states’ rights in this field: “To permit
    the states and their instrumentalities to import commodities for their own use, regardless
    of the requirements imposed by the Congress, would undermine, if not destroy, the single
    control which it was one of the dominant purposes of the Constitution to create.” 
    Id. at 59.
    In that case there could be no question that the federal law—which imposed a
    customs duty on imported equipment—was a regulation of foreign commerce. The
    argument to the court was that there should be an exemption from that regulation for state
    entities. And the Court rejected the argument, noting the importance of not allowing
    variation among the States.
    Fifty years later, in Japan Line, Ltd. v. County of Los Angeles, 
    444 U.S. 434
    (1979), the Court considered not the powers of Congress, but the limits that the power
    given to Congress under the Foreign Commerce Clause implicitly places on the powers of
    the States in the absence of federal legislation—the so-called dormant Foreign Commerce
    14
    Clause. The State of California sought to assess an ad valorem property tax on cargo
    containers aboard Japanese ships temporarily docked in California’s ports. See 
    id. at 436–37.
    The Japanese owner of the containers objected that the State lacked the power to
    burden foreign commerce in this way. See 
    id. at 437–38.
    The Court agreed, holding that
    the dormant Foreign Commerce Clause vests in the federal government the exclusive
    power to regulate commerce with foreign nations and forbids the tax. See 
    id. at 453–54.
    There was no question that the activity at issue in Japan Lines was regulation of
    foreign commerce. The question was the extent to which the States shared this regulatory
    power with the federal government. What the Court held was that the dormant Foreign
    Commerce Clause limited the powers of States to regulate foreign commerce more than
    the Interstate Commerce Clause limits the powers of States to regulate interstate
    commerce. Indeed, the Court assumed that the California tax would be lawful if applied
    to goods transported in interstate commerce. Under the dormant Interstate Commerce
    Clause test set forth in Complete Auto Transit, Inc. v. Brady, 
    430 U.S. 274
    (1977), a tax
    does not impose an impermissible burden on interstate commerce if it “‘is applied to an
    activity with a substantial nexus with the taxing State, is fairly apportioned, does not
    discriminate against interstate commerce, and is fairly related to the services provided by
    the State.’” Japan 
    Line, 441 U.S. at 444
    –45 (quoting Complete 
    Auto, 430 U.S. at 279
    ).
    The Court said, however, that “two additional considerations” are at play under the
    Foreign Commerce Clause. 
    Id. at 446.
    One is the imperative, mentioned in Board of
    
    Trustees, 289 U.S. at 59
    , that the country “speak with one voice when regulating
    commercial relations with foreign governments.” Japan 
    Line, 441 U.S. at 449
    (internal
    15
    quotation marks omitted). State taxes on foreign commerce could generate international
    disputes and result in retaliation against American instrumentalities present in foreign
    jurisdictions. See 
    id. at 450.
    The other consideration is that the “fair apportionment”
    component of the Complete Auto test cannot be enforced in the international context. See
    
    id. at 446.
    That test can prevent multiple taxation of instrumentalities in interstate
    commerce because the Supreme Court can “enforce full apportionment by all potential
    taxing bodies.” 
    Id. at 447.
    In the international sphere, however, there is no “authoritative
    tribunal capable of ensuring that the aggregation of taxes is computed on no more than
    one full value.” 
    Id. at 447–48.
    “[N]either [the] Court nor this Nation can insure full
    apportionment when one of the taxing entities is a foreign sovereign.” 
    Id. at 447;
    see
    Anthony Colangelo, The Foreign Commerce Clause, 
    96 Va. L
    . Rev. 949, 966–69 (2010)
    (analyzing Japan Line).
    One sentence in Japan Line requires careful analysis. In discussing the need for
    national uniformity with respect to foreign commerce, the Court said, “Although the
    Constitution, Art. I, § 8, cl. 3, grants Congress power to regulate commerce ‘with foreign
    Nations’ and ‘among the several States’ in parallel phrases, there is evidence that the
    Founders intended the scope of the foreign commerce power to be the greater.” 
    Id. at 448.
    The government’s brief points to this sentence in support of its argument that
    congressional power under the Foreign Commerce Clause is “plenary.” But the sentence
    must be read in context. The Court did not say that the term commerce has a broader
    meaning in the foreign-commerce context than it does in the interstate-commerce context.
    Nor did it say that the term regulate has a broader meaning in the former context. Nor
    16
    did the Japan Line opinion have occasion to consider congressional power to regulate the
    conduct of Americans abroad. Indeed, the question was not the extent of congressional
    power; no one was arguing about whether Congress could pass legislation imposing taxes
    like those imposed by California, or even authorize states to impose such taxes. Rather,
    the question was the exclusivity of congressional power: Could California, in the absence
    of federal regulation, impose its own regulations? The one-voice principle in Foreign
    Commerce Clause jurisprudence does not expand congressional power. It does not add a
    megaphone to magnify the voice of Congress and permit it to enact legislation that it
    would not otherwise be permitted to enact. Rather, it is a restriction on the States. It
    silences them so that only the voice of the national government is heard on international
    matters.
    This construction of the meaning of the comment in Japan Lines is consistent
    with the “evidence” that the Court referred to in its footnote. See 
    id. at 448
    n.12. The
    footnote cites to Federalist No. 42, which discusses the powers granted the federal
    government to “regulate the intercourse with foreign nations,” such as the powers to
    make treaties, to send and receive ambassadors, and to regulate foreign commerce. The
    Federalist No. 42, at 231 (Madison) (E.H. Scott ed., 1898). The essay states: “This class
    of powers forms an obvious and essential branch of the federal administration. If we are
    to be one nation in any respect, it clearly ought to be in respect to other nations.” 
    Id. 17 This
    passage is certainly support for the exclusivity of federal authority noted in Japan
    Line, but it has no relevance to our case.5
    The Court’s footnote also cites a law-review article as “concluding, after an
    exhaustive survey of contemporary materials: ‘Despite the formal parallelism of the
    grants, there is no tenable reason for believing that anywhere nearly so large a range of
    action was given over commerce “among the several states” as over that “with foreign
    
    nations.”’” 441 U.S. at 448
    n.12 (quoting Abel, supra at 475). Nothing in the article,
    however, even hints at the possibility that the Foreign Commerce Clause could be used to
    govern noncommercial conduct of Americans abroad. The quotation from the Abel
    article is the conclusion of a discussion confirming the accuracy of Madison’s
    recollection of the Convention decades afterwards, in which he “explicitly negatives the
    suggestion that the [Interstate Commerce Clause] was designed to have as wide an
    operation as the companion grant with regard to foreign commerce, and assigns to it
    instead merely ‘a negative and preventive’ function, to control state-created
    discriminations and preferences.” Abel at 469 (quoting Letter of February 13, 1829, to J.
    C. Cabell, as quoted in 3 Farrand 478). In other words, Abel was saying that the
    5
    The essay also notes the role played by the Interstate Commerce Clause in facilitating
    foreign commerce: “[I]t may be added, that without this supplemental provision [the
    Interstate Commerce Clause], the great and essential power of regulating foreign
    commerce would have been incomplete and ineffectual. A very material object of this
    power was the relief of the States which import and export to other States, from the
    improper contribution levied on them by the latter.” The Federalist No. 42 at 235. An
    1829 letter from James Madison cited in the Japan Line footnote also states this purpose
    for the Interstate Commerce Clause. Again, the point being made is the need for
    exclusive federal power.
    18
    Framer’s view, totally contrary to current doctrine, was that the Interstate Commerce
    Clause was not considered as a grant of affirmative legislative power to regulate
    interstate commerce, but as a means to constrain state interference with such commerce.
    See 
    id. at 468
    –75; see also 
    id. at 471
    (“There is thus not a single occasion in the
    proceedings of the convention itself where the grant of power over commerce between
    the states was advanced as the basis for independent affirmative regulation by the federal
    government. Instead, it was uniformly mentioned as a device for preventing obstructive
    or partial regulations by the states.”). Moreover, the Abel article points out the limited
    scope that the Founders gave to the term commerce even in the foreign-commerce
    context: “These three large classes of subjects—fiscal regulation [that is, duties] as to
    imports and exports, navigation, ‘mercantile’ enterprises—are the only ones that there is
    any evidence for believing were thought of by any one as embraced within ‘commerce’
    or affected by the grant of power to regulate it.” Abel, supra at 465; see also 
    id. at 464
    (emphasizing the narrow notion of mercantile (or merchant) enterprises at the time of the
    Convention, stating that the merchant’s “activities conform nicely to those of the present-
    day importer, commission house, and wholesale firm, with just a dash of the commodity
    exchange; they hardly embrace those of the jobber, the hawker, or the retailer, who to us
    is the merchant par excellence.”). What we now consider to be the scope of the
    interstate-commerce power surely exceeds the Founders’ conception of the foreign-
    commerce power. See 
    id. at 478
    (“Today [that is, 1941] we are accustomed to think of
    the arteries of commerce, the highways and the inland streams, harbors, bridges, and the
    19
    like, as within the ambit of congressional power under the commerce clause. This is not
    the way the framers of the constitution looked at the matter.”).6
    The panel opinion suggests that the text of the Commerce Clause indicates that
    power under the Foreign Commerce Clause exceeds that under the Interstate Commerce
    Clause. See Maj. Op. at 27–28. It notes that the Clause speaks of commerce “with
    foreign Nations” but “among the several States.” But the difference in prepositions
    indicates the opposite. If the Clause permitted regulation of commerce “among foreign
    nations”—so that the two clauses used the same preposition—then Congress would be
    empowered to regulate commerce among France, England, and Italy, even if the United
    States were not involved at all. Thus, use of the preposition with instead of the
    preposition among obviously limits the extent of the Foreign Commerce Clause. See
    Colangelo supra at 970–71 (explaining the difference between the uses of the two
    prepositions in the Commerce Clause).7
    In short, the greater-power statement by the Supreme Court in Japan Line should
    not be overread. The statement was made in the context of the assertion that the need for
    national uniformity under the Foreign Commerce Clause could require greater limitations
    6
    The Japan Line footnote also cited two student notes that do not affect the analysis.
    7
    I am perplexed by the statement: “‘Among’ in the [Interstate Commerce
    Clause] restrains Congress in regulating intrastate matters—a constraint not
    present in the [Foreign Commerce Clause].” Maj. Op. at 27. Since the Foreign
    Commerce Clause requires that the commerce be that of a foreign country with the
    United States, it obviously restrains the application of that Clause within a foreign
    country.
    20
    on state action than would the Interstate Commerce Clause alone. As Justice Thomas has
    observed:
    This Court’s statements about the comparative breadth of the Foreign
    Commerce Clause are of questionable relevance where the issue is
    Congress’ power to regulate, or even criminalize, conduct within another
    nation’s sovereign territory. . . . [E]ven if the foreign commerce power
    were broader than the interstate commerce power as understood at the
    founding, it would not follow that the foreign commerce power is broader
    than the interstate commerce power as this Court now construes it.
    Baston v. United States, 
    137 S. Ct. 850
    , 852 (2017) (Thomas, J., dissenting from denial of
    certiorari).
    This is not to say that national powers under the Foreign Commerce Clause and
    the Interstate Commerce Clause must be identical. After all, Japan Line makes clear that
    they are not. When it comes to state taxation of commerce, there are “plain intelligible
    cause[s],” 
    Gibbons, 22 U.S. at 194
    , why States must be more limited in taxing foreign
    commerce than in taxing interstate commerce. For one thing, there is the need for the
    nation to speak with one voice in relations with other countries. That “cause,” however,
    has no purchase in this case. The statutory provision under which Defendant was
    convicted was hardly animated by any perceived need to prevent the various States from
    engaging in conflicting policies toward foreign nations.
    The panel opinion also suggests that some interstate-commerce doctrine—in
    particular, the gloss presented in Lopez and Morrison—does not apply because the limits
    on interstate-commerce power in that doctrine reflect concerns for the sovereignty of the
    States, concerns not present in foreign-commerce doctrine. But surely there is no reason
    to define the terms commerce and regulate more broadly in the foreign-commerce
    21
    context than in the interstate-commerce context. And the majority’s approach overlooks
    a key principle underlying Lopez and Morrison: The Court’s concern was not just that an
    overbroad conception of the interstate-commerce clause would give the federal
    government authority that could override police powers held by the States; it also
    expressed a fundamental concern that an overbroad conception would give the federal
    government general police powers, contrary to the constitutional framework of a federal
    government of limited power. See, e.g., 
    Lopez, 514 U.S. at 564
    (“if we were to accept the
    Government’s arguments, we are hard pressed to posit any activity by an individual that
    Congress is without power to regulate”); 
    id. at 56
    6 (“The Constitution . . . withhold[s]
    from Congress a plenary police power that would authorize enactment of every type of
    legislation.”); 
    id. at 56
    7 (“To uphold the Government’s contentions here, we would have
    to pile inference upon inference in a manner that would bid fair to convert congressional
    authority under the Commerce Clause to a general police power of the sort retained by
    the States.”); see also Nat’l Fed’n of Indep. Bus., 
    567 U.S. 519
    , 535–36 (Roberts, C.J.,
    writing separately) (“This case concerns two powers that the Constitution does grant the
    Federal Government, but which must be read carefully to avoid creating a general federal
    authority akin to the police power.”).
    The real danger lies in overbroad application of the third type of regulation under
    the Commerce Clause: the regulation of activities that substantially affect commerce.
    Given the reality that in modern times every activity can be said to have some effect on
    commerce, courts must set reasonable limits on the meaning of “substantial effect” or
    concede that the vision of a Constitution of limited powers, see, e.g., U.S. Const. amend.
    22
    X, is a mirage and anything can be justified under the Commerce Clause. The power
    under the Foreign Commerce Clause is one of the limited powers granted to Congress by
    the Constitution. Courts should not construe it in a way that would amount to ceding to
    Congress a general police power over Americans with respect to all conduct beyond our
    shores.
    Unlike the Supreme Court doctrine that the Foreign Commerce Clause embodies
    the concept that the country should speak with one voice in foreign affairs, which is
    firmly supported by evidence from the Founding, there is nothing—at least nothing
    brought to my attention or that I have found—suggesting that the Framers held any idea
    remotely like the possibility that the Foreign Commerce Clause would provide plenary
    power to police the behavior of Americans in foreign countries. Rather, the evidence is
    to the contrary. As Chief Justice Marshall explained:
    The jurisdiction of the nation within its own territory is necessarily
    exclusive and absolute. It is susceptible of no limitation not imposed by
    itself. Any restriction upon it, deriving validity from an external source,
    would imply a diminution of its sovereignty to the extent of the restriction,
    and an investment of that sovereignty to the same extent in that power
    which could impose such restriction.
    All exceptions, therefore, to the full and complete power of a nation
    within its own territories, must be traced up to the consent of the nation
    itself. They can flow from no other legitimate source.
    The Schooner Exch. v. McFaddon, 
    11 U.S. 116
    , 136 (1812) (emphasis added). And
    specifically with respect to trade, Alexander Hamilton wrote the following a few years
    after ratification of the Constitution:
    Congress . . . may regulate by law our own Trade and that which
    foreigners come to carry on with us, but they [that is, Congress] cannot
    regulate the Trade which we may go to carry on in foreign countries, they
    23
    can give to us no rights, no privileges there. This must depend on the will
    and regulation of those countries; and consequently it is the province of the
    power of Treaty to establish the rule of commercial intercourse between
    foreign nations and the U[nited] States. The Legislature may regulate our
    own Trade but Treaty only can regulate the mutual Trade between our own
    and another Country.
    Alexander Hamilton, The Defence No. XXXVI (Jan. 2, 1796), in 20 The Papers of
    Alexander Hamilton (Harold C. Syrett ed. 1974), available at
    http://founders.archives.gov/documents/Hamilton/01-20-02-00028; see 
    Al-Maliki, 787 F.3d at 793
    (“[A]n unbounded reading of the Foreign Commerce Clause allows the
    federal government to intrude on the sovereignty of other nations—just as a broad
    reading of the Interstate Commerce Clause allows it to intrude on the sovereignty of the
    States.”), cert. denied, 
    136 S. Ct. 204
    (2015).
    These views of the exclusivity of sovereign jurisdiction are overstated, at least
    under current international law. I recognize that international law now generally permits
    a nation “to prescribe law with respect to . . . the activities, interests, status, or relations of
    its nationals outside as well as within its territory.” Restatement (Third) of the Foreign
    8
    The panel opinion points to an additional passage from earlier in Hamilton’s essay:
    “[A nation’s] power to make laws . . . acts compulsively upon all persons, whether
    foreigners or Citizens, and upon all things, within its territory, and it acts in like manner
    upon its own citizens and their property without its territory in certain cases and under
    certain limitations. But it can have no obligatory action whatsoever upon a foreign nation
    or any person or thing within the jurisdiction of such foreign Nation.” The Defence. The
    panel opinion reads this passage as permitting prosecution for acts in another country so
    long as the prosecution occurs here. See Maj. Op. 34 n.17. This is not an unreasonable
    interpretation if the passage is read in isolation, although such a prosecution would seem
    to contradict the notion expressed by Hamilton that a nation cannot impose obligations on
    someone (that is, on his or her conduct) while in a foreign jurisdiction. But in any event,
    any ambiguity in this passage is resolved by the later passage quoted in the above text,
    which says that Congress “cannot regulate the trade which we may go to carry on in
    foreign countries.” The Defence.
    24
    Relations Law of the United States § 402 (1986); see United States v. Mitchell, 
    553 F.2d 996
    , 1001 (5th Cir. 1977). But see Restatement (Third) §403(1) (“a state may not
    exercise jurisdiction to prescribe law with respect to a person or activity having
    connections with another state when the exercise of such jurisdiction is unreasonable”);
    Colangelo supra at 1035–37. But that is beside the point that is relevant here. This
    proposition of international law does not distinguish the Foreign Commerce Clause from
    the Interstate Commerce Clause. International law would permit the federal government
    to enact the statutes struck down in Lopez and Morrison. The question is what our
    Constitution permits. And the statements by Chief Justice Marshall and Alexander
    Hamilton, together with the absence of any evidence that the Foreign Commerce Clause
    was conceived as providing congressional authority to govern all (or any?) conduct in
    foreign nations, strongly suggest that the sovereignty of foreign governments was as
    much assumed with respect to the Foreign Commerce Clause as was state sovereignty
    with respect to the Interstate Commerce Clause. (It should also be noted that in one
    respect the sovereignty of foreign nations was entitled to greater consideration—namely,
    the States, by ratifying the Constitution, had voluntarily ceded some of their sovereignty
    to the federal government.)
    Indeed, Japan Line based its limitations on state power imposed by the Foreign
    Commerce Clause in part on the recognition of the limits of the federal government’s
    power in other countries. When foreign commerce is taxed by the States, the Supreme
    Court cannot prevent multiple taxation by requiring apportionment of the taxes by the
    sovereignties imposing them, as the Court can when only interstate commerce is
    25
    involved, because the Court has no authority over foreign governments. 
    See 441 U.S. at 447
    –48. And for the same reason, the federal government cannot prevent foreign nations
    from retaliating when the States impose such taxes. See 
    id. at 450.
    Federal power under
    the Foreign Commerce Clause should be construed with consideration of the sovereign
    power of other nations just as federal power under the Interstate Commerce Clause is
    constrained by state sovereignty. See 
    Al-Maliki, 787 F.3d at 793
    ; Anthony J. Colangelo,
    The Foreign Commerce Clause, 
    96 Va. L
    . Rev. 949, 971–83 (2010) (identifying the
    “Foreign Sovereignty Concern” as a limit on congressional power under the Foreign
    Commerce Clause).
    Further, the Tenth Amendment—“The powers not delegated to the United States
    by the Constitution, nor prohibited by it to the States, are reserved to the States
    respectively, or to the people”—emphasizes that exceeding power under the Foreign
    Commerce Clause infringes on the rights of the people. See 
    Al-Maliki, 787 F.3d at 793
    (“[A]n overbroad interpretation of the Foreign Commerce Clause allows the government
    to intrude on the liberty of individual citizens. And that seems at least as wrong as a
    reading of the Commerce Clause that allows the government to intrude on the States. See
    U.S. Const. amend. X (reserving power to the States ‘or to the people.’”).
    I should emphasize that the point I am making is a limited one. I am not saying
    that the Constitution forbids the exercise of any power over conduct in other nations. For
    one thing, constitutional provisions other than the Foreign Commerce Clause can be the
    source of such power. And my view does not totally foreclose the exercise of such power
    under the Foreign Commerce Clause, even as authority for other provisions of the
    26
    PROTECT Act. For example, what I am saying does not call into question the
    constitutionality of the prohibition on travel to a foreign country with the intent to engage
    in illicit sexual conduct (the charge Defendant was acquitted of) or the prohibition on
    engaging in commercial illicit sexual conduct after travel to a foreign country. I am
    merely rejecting the notion that because the Foreign Commerce Clause overrides state
    sovereignty, the power under the Clause to regulate conduct in foreign nations is
    unconstrained.
    To summarize, absent some “plain, intelligible cause”—such as the need for the
    nation to speak with one voice in foreign affairs or the limits of national power in a
    foreign country—I shall assume that the language “to regulate commerce” has the same
    meaning in the Foreign Commerce Clause as in the Interstate Commerce Clause. In
    particular, I borrow jurisprudence regarding the Interstate Commerce Clause in two
    respects. First, since the power of Congress under both that clause and the Foreign
    Commerce Clause is “[t]o regulate Commerce,” I can adopt the Interstate Commerce
    Clause doctrine interpreting that language to encompass three types of regulation:
    regulation of the channels of commerce, regulation of the instrumentalities of commerce,
    and regulation of activities that substantially affect commerce. See 
    Gonzales, 545 U.S. at 16
    (“Cases . . . have identified three general categories of regulation in which Congress is
    authorized to engage under its commerce power”); United States v. Clark, 
    435 F.3d 1100
    ,
    1118 (9th Cir. 2006) (Ferguson, J., dissenting) (“A fairer understanding of the tri-
    category framework is that it has evolved not only in response to federalism concerns that
    courts have read into Congress’s Interstate Commerce power, but also to give content to
    27
    what it means generally ‘[t]o regulate Commerce,’ art. I, § 8, cl. 3.” (brackets in
    original)). Other courts and judges have done the same when evaluating congressional
    enactments under the Foreign Commerce Clause. See 
    Bollinger, 798 F.3d at 215
    (“We
    agree that the Lopez categories provide a useful starting point in defining Congress’s
    powers under the Foreign Commerce Clause.”); 
    Pendleton, 658 F.3d at 308
    (analyzing
    constitutionality of PROTECT Act provision under “Lopez’s ‘time-tested’ [Interstate
    Commerce Clause] framework” since the “Supreme Court has not yet held that Congress
    has greater authority to regulate activity outside the United States than it does within its
    borders”); 
    Clark, 435 F.3d at 1118
    (Ferguson, J., dissenting) (criticizing majority for
    departing from Interstate Commerce Clause framework in resolving issue under Foreign
    Commerce Clause); United States v. Reed, No. CR 15-188 (APM), 
    2017 WL 3208458
    ,
    at *7 (D.D.C. July 27, 2017) (“Given the ambiguous contours of this constitutional power
    and the dearth of precedent in this jurisdiction, this court will look—as others have
    done—to the well-known Interstate Commerce Clause framework to analyze whether
    Section 2423(c) is a constitutional exercise of Congress’ Commerce Power.”); cf. United
    States v. Baston, 
    818 F.3d 651
    , 668 (11th Cir. 2016), cert. denied, 
    137 S. Ct. 850
    (2017)
    (upholding statute on assumption “that the Foreign Commerce Clause has the same scope
    as the Interstate Commerce Clause”); United States v. Bredimus, 
    352 F.3d 200
    , 204–08
    (5th Cir. 2003) (analyzing 18 U.S.C. § 2423(b) foreign-commerce issue under framework
    of interstate-commerce case law, but stating that under Japan Line greater deference is
    owed to regulation of foreign commerce); United States v. Homaune, 
    898 F. Supp. 2d 153
    , 159 (D.D.C. 2012) (upholding statute on assumption that the “Foreign Commerce
    28
    Clause is at least as broad as the more familiar Interstate Commerce Clause,” citing
    Japan Line).
    Second, I adopt the limiting principle employed by the Court in the interstate-
    commerce context that the power conferred by the Clause cannot be construed so broadly
    as to encompass everything that can somehow be causally connected to commerce. Such
    a construction would be contrary to any notion of the Constitution as the source of only
    enumerated powers. See 
    Morrison, 529 U.S. at 615
    –19; 
    Lopez, 514 U.S. at 566
    (“The
    Constitution . . . withhold[s] from Congress a plenary police power”); see also Nat’l
    Fed’n of Indep. Bus. v. Sebelius, 
    567 U.S. 519
    , 554 (2012) (separate opinion of Roberts,
    C.J.) (“[O]ur cases have ‘always recognized that the power to regulate commerce, though
    broad indeed, has limits.’” (quoting Maryland v. Wirtz, 
    392 U.S. 183
    , 196 (1968)); 
    id. at 536
    (Congress’s power over commerce “must be read carefully to avoid creating a
    general federal authority akin to the police power.”). In the contemporary world, where
    everything can be said to be connected in some way to international commerce, the risk
    of using the Foreign Commerce Clause to justify plenary police powers (not just at home,
    but abroad as well) is every bit as great as the risk of using the Interstate Commerce
    Clause for the same purpose. Thus, when I turn to congressional power under the
    Foreign Commerce Clause to enact the third category of regulation—regulation of
    activities that substantially affect commerce—I will keep in mind the Supreme Court’s
    conception of “substantially” to preclude regulation of activities whose connection to
    commerce is too indirect.
    29
    III.   Application of Foreign Commerce Clause to This Case
    I now proceed to consider whether § 2423(c), as applied to noncommercial illicit
    sexual conduct, can be justified under the Foreign Commerce Clause as one of the three
    types of permissible regulation.
    A.     Channels of Commerce
    As discussed at length earlier in this opinion, the Commerce Clause grants
    Congress the authority “to keep the channels of interstate commerce free from immoral
    and injurious uses.” 
    Caminetti, 242 U.S. at 491
    ; see 
    Perez, 402 U.S. at 150
    (“The
    Commerce Clause reaches . . . the use of channels of interstate or foreign commerce
    which Congress deems are being misused.” (emphasis added)). Under this authority the
    Supreme Court has affirmed bans on interstate transportation of women who are to be put
    to immoral purposes, 
    Caminetti, 242 U.S. at 483
    ; wives for the purpose of polygamy, see
    
    Cleveland, 329 U.S. at 18
    ; kidnapped persons, see 
    Perez, 402 U.S. at 150
    ; stolen
    property, see id.; or lottery tickets, see Lottery 
    Case, 188 U.S. at 354
    –55. In these cases
    the person or thing barred from interstate commerce was tainted by either prior immoral
    conduct or the intent to engage in such conduct upon completion of the journey.
    That channels authority does not extend to the conduct for which Defendant was
    convicted. I can assume that it extends to the conduct for which the jury found
    Defendant not guilty—traveling in [foreign commerce] with the intent to commit illicit
    sexual conduct. But absent that intent, Defendant could not be distinguished from any
    ordinary international traveler. The channels of foreign commerce were free of immoral
    and injurious uses since his intent was not found to be corrupt. He was not tainted at the
    30
    time of travel. Cf. 
    Patton, 451 F.3d at 621
    n.3 (“[T]he statute [in Caminetti] does not
    criminalize the transportation of persons who happen, after crossing state lines, to
    become prostitutes.”); 
    Clark, 435 F.3d at 1120
    (Ferguson, J., dissenting) (“The mere act
    of boarding an international flight, without more, is insufficient to bring all of [a
    person’s] downstream activities . . . within the ambit of Congress’s Foreign Commerce
    power.”).
    The government nevertheless suggests that this court is bound to hold that the
    statutory provision before us constitutes channels regulation because of our conclusion in
    United States v. Hinckley, 
    550 F.3d 926
    , that the Sex Offender Registration and
    Notification Act (SORNA) can be upheld as regulation of the channels of commerce.
    The rationale for SORNA is that convicted sex offenders pose a particular danger to the
    public, the public needs to be warned of their proximity, and they should not be permitted
    to misuse the channels of interstate commerce to move from the state of conviction to
    another state to avoid this publicity. Under SORNA, sex offenders are not absolutely
    prohibited from interstate travel, but they can do so only if they register promptly upon
    establishing a new residence.
    SORNA is a comfortable fit as channels regulation. The person subject to
    regulation is a person who can be identified while in the channels of commerce—the
    person has been convicted of a sexual offense. Such persons can be considered tainted
    things traveling in the channels of interstate commerce. And the SORNA registration
    requirement is an incidental condition for permitting such persons to travel in those
    channels. See United States v. Anderson, 
    771 F.3d 1064
    , 1070 (8th Cir. 2014) (“[T]he
    31
    registration requirements of [SORNA] are part of the constitutional power Congress has
    to punish sex offenders who cross state lines. Because Congress has the power to punish
    sex offenders across state lines, Congress is able to exercise the ‘narrow’ and ‘incidental’
    power of requiring those sex offenders to register.” (citation omitted)). That is a very
    different situation from the statutory provision here, because the defendant traveling to a
    foreign country cannot be singled out for any prior misconduct or even any intent to
    commit misconduct in the future. Hinckley does not control this case.
    The government has not offered any principled basis, or any basis for that matter,
    for upholding channels-of-commerce authority for Defendant’s offense that would not
    permit Congress to subject an American to federal prosecution for any offense committed
    abroad. Congress could penalize an American who traveled abroad and committed fraud,
    gambled (even if lawful where conducted), or merely littered. The federal government
    would have plenary police power over all Americans anywhere in the world. This cannot
    be the product of a Constitution of limited powers. I respectfully disagree with the Third
    Circuit’s reliance on the above-cited channel-of-commerce cases to sustain a similar
    conviction. See 
    Pendleton, 658 F.3d at 311
    .
    B.     Instrumentalities of Commerce and Persons or Things in
    Commerce
    Lopez held that “Congress is empowered to regulate and protect the
    instrumentalities of interstate commerce, or persons or things in interstate commerce,
    even though the threat may come only from intrastate 
    activities.” 514 U.S. at 558
    . No
    court has affirmed the PROTECT Act on this ground. The government, however, argues
    32
    that Defendant was a person “in [foreign] commerce” and therefore subject to
    congressional regulation. But this argument is based on a misconception of what it
    means to be “in interstate [or foreign] commerce.” What Lopez was speaking of was
    regulation governing persons or things while they are traveling. A law prohibiting
    robbing people riding on an interstate stagecoach or thefts of property from trains would
    be within this power. See 
    Patton, 451 F.3d at 622
    (suggesting that a proper statute under
    the Commerce Clause could “protect [an item] while it is moving in interstate
    shipment”). Our precedent notes that “[t]he illustrative cases for this category involve
    things actually being moved in interstate commerce, not all people and things that have
    ever moved across state lines.” 
    Id. Section 2433(c)
    is obviously not protecting
    Defendant while he is moving in foreign commerce, or protecting the instrumentalities of
    foreign commerce that he is using. See 
    id. Although we
    stated in passing in 
    Hinckley, 550 F.3d at 940
    , that SORNA would
    be constitutional under this category of regulation of interstate commerce, we did not
    distinguish the category as applied in that context from the first category of regulation—
    regulation of the channels of commerce. And I have already explained how SORNA
    differs from § 2423(c) under the first category, so Hinckley is distinguishable on that
    score. I am reluctant to read the passing reference in Hinckley as a rejection of the more
    thorough analysis provided by Patton of the second category of regulation. Cf. Auraria
    Student Hous. v. Campus Vill. Apartments, 
    843 F.3d 1225
    , 1235 (10th Cir. 2016) (earlier
    circuit precedent ordinarily prevails over later decision).
    33
    C.      Substantial Effects on Commerce
    The final source of congressional authority over commerce is the power to
    regulate “activities that substantially affect interstate [or foreign] commerce.” 
    Lopez, 514 U.S. at 559
    . In analyzing this issue, it is first necessary to recognize that noncommercial
    sexual activity is not commerce. It is not “the buying, selling, production, or
    transportation of products or services, or any activity preparatory to it.” 
    Patton, 451 F.3d at 624
    –25. It is not even economic activity, which “refers to the production, distribution,
    and consumption of commodities.” 
    Raich, 545 U.S. at 25
    (internal quotation marks
    omitted)); see Patton at 625 (“[I]n Raich, the [Supreme] Court interpreted the contours of
    the third category by reference to ‘economics’ rather than ‘commerce,’ and included the
    ‘consumption of commodities’ as well as their production and distribution within that
    definition.”). Engaging in noncommercial nonconsensual sexual activity is no more an
    economic activity than the gender-motivated violence targeted by the statute held
    unconstitutional in Morrison. 
    See 529 U.S. at 613
    (“Gender-motivated crimes of
    violence are not, in any sense of the phrase, economic activity.”).
    The fact that noncommercial nonconsensual sexual activity is not economic
    activity is extremely important, probably dispositive, in determining whether it is subject
    to the third category of regulation of commerce. The Supreme Court thus far has upheld
    under the third category only regulation of economic activity. See 
    Raich, 545 U.S. at 17
    (“Our case law firmly establishes Congress’ power to regulate purely local activities that
    are part of an economic ‘class of activities’ that have a substantial effect on interstate
    commerce.”) The panel opinion cites Raich as a case in which the Court “upheld
    34
    congressional regulation of noncommercial activity.” Maj. Op. at 52 n.21. But the
    Supreme Court opinion made clear that the activity, even if not commercial, was
    “economic.” It distinguished earlier Court decisions overturning congressional
    legislation with the words: “Unlike those at issue in Lopez and Morrison, the activities
    regulated by the [Controlled Substances Act] are quintessentially economic.” 
    Raich, 545 U.S. at 25
    (emphasis added).
    To be sure, the term illicit sexual conduct in § 2423 does include economic, even
    commercial, activity. But the broad statutory definition of the term cannot change the
    nature of every activity within the definition. Suppose the Controlled Substances Act
    also prohibited jogging (because it can produce a runner’s high). That would not place
    jogging within the “economic class of activities” of controlled substances and thereby
    allow the prohibition. Cf. 
    Sebelius, 567 U.S. at 547
    –61 (Opinion of Roberts, C.J.)
    (failure to purchase medical insurance is not economic activity and cannot be regulated
    under the Commerce Clause despite effect on health-insurance market); 
    id. at 646–48
    (Scalia, J., joined by three other Justices in concurring on this issue) (“failure to engage in
    economic activity (the purchase of health insurance) is [not] subject to regulation under
    the Commerce Clause”).
    But even if noncommercial illicit sexual conduct could be regulated if it has a
    substantial effect on commerce, there is no reason to believe that it has such an effect. As
    noted earlier, the Supreme Court has examined three factors in conducting a substantial-
    effect analysis: the relation of the regulated activity to commerce; congressional findings
    about the activity’s effects on commerce; and the presence in the statute of an express
    35
    jurisdictional element limiting the reach of the statute. See 
    Morrison, 529 U.S. at 611
    –
    13. I now consider those factors.
    1.     Relation of Activity to Commerce
    Noncommercial activity can affect commerce. The Supreme Court has
    recognized, for example, that if the activity involves a good that is identical to (fungible
    with) goods in commerce, regulation may be permissible. (Do not forget, though, that
    activity with respect to goods is “economic” activity. See 
    Raich, 545 U.S. at 25
    .) In
    Wickard, Congress had authorized quotas on the production of wheat because the
    industry had been plagued by large surpluses that depressed prices. 
    See 317 U.S. at 113
    ,
    125–28. A farmer who grew wheat in excess of the quota (to feed poultry and livestock
    on his farm, to use in making flour for home consumption, and for seeding the following
    year) challenged the quota, arguing that it regulated noncommercial conduct. See 
    id. at 114,
    118. But the Court upheld the quota as a permissible regulation to protect the price
    of a commodity because the aggregate effect of many farmers exceeding the quota would
    substantially affect the wheat market. See 
    id. at 127–28.
    It reasoned that farmers who
    grow wheat in excess of the quota purely for home consumption are doing so instead of
    buying wheat on the market, thereby decreasing the demand for wheat and undermining
    Congress’s goal of boosting the price. See 
    id. at 128–29.
    “Home-grown wheat in this
    sense competes with wheat in commerce.” 
    Id. at 128.
    Congress therefore had the
    authority to regulate wheat grown “wholly for consumption on the farm” to protect the
    price of the commodity in commerce. 
    Id. at 118.
    36
    Six decades later, the Supreme Court addressed a challenge to the federal ban on
    marijuana in the Controlled Substances Act (CSA). The CSA, said the Court, “regulates
    the production, distribution, and consumption of commodities for which there is an
    established, and lucrative, interstate market.” 
    Raich, 545 U.S. at 26
    . In particular,
    Congress had classified marijuana as a drug with a high potential for abuse and no
    accepted medical use, which made its manufacture, distribution, or possession a criminal
    offense. See 
    id. at 14.
    The question was whether those prohibitions could encompass
    “the intrastate, noncommercial cultivation and possession of cannabis for personal
    medical purposes as recommended by a patient’s physician pursuant to a valid California
    state law.” 
    Id. at 8
    (internal quotation marks omitted). The Court answered the question
    affirmatively because Congress “had a rational basis for concluding that leaving home-
    consumed marijuana outside federal control would . . . affect price and market
    conditions.” 
    Id. at 19.
    Just like wheat grown for home consumption, marijuana
    cultivated for that purpose overhangs the market, making it likely that “high demand in
    the interstate market will draw such marijuana into the market.” 
    Id. Relying on
    Wickard and Raich, the government argues that the PROTECT Act is
    within congressional power because it was enacted “to close the child-sex-tourism
    market.” Aplee. Br. at 62. That rationale may well suffice with respect to the provision
    of the Act barring commercial sex. But the analogy to Wickard and Raich fails when it
    comes to the provision of the Act under which Defendant was convicted. The regulated
    activities in Wickard and Raich may not have been commerce, but they were economic.
    Defendant’s illicit sexual conduct, in contrast, was not. To advance regulatory authority
    37
    from commerce to economic activity is one thing. The step from economic activity to
    noneconomic activity may be a step too far. See 
    Morrison, 529 U.S. at 611
    (“[I]n those
    cases where we have sustained federal regulation of intrastate activity based upon the
    activity’s substantial effects on interstate commerce, the activity in question has been
    some sort of economic endeavor.”); 
    id. at 613
    (“While we need not adopt a categorical
    rule against aggregating the effects of any noneconomic activity to decide these cases,
    thus far in our Nation’s history our cases have upheld Commerce Clause regulation of
    intrastate activity only where that activity is economic in nature.”). At the least, when the
    regulation of noneconomic activity is justified under the Commerce Clause on the ground
    that it substantially affects commerce, that justification cannot be based on “pil[ing]
    inference upon inference” in a way that threatens to make the Clause a source of a
    general police power. 
    Lopez, 514 U.S. at 567
    . Tenuous connections are not
    “substantial.” And one must keep firmly in mind that the Court has yet to find a
    substantial effect on commerce arising from noneconomic activity. See 
    Morrison, 529 U.S. at 611
    , 613.
    In any event, the government has not offered any reason to believe that control of
    noneconomic sex abuse will affect the market in commercial sex trafficking. When
    dealing with fungible commodities the connection is clear. See 
    Raich, 545 U.S. at 19
    (“In both cases, the regulation is squarely within Congress’ commerce power because
    production of the commodity meant for home consumption, be it wheat or marijuana, has
    a substantial effect on supply and demand in the national market for that commodity.”)
    But here there is no apparent connection. If data show that prosecutions of
    38
    noncommercial child sexual abuse reduce the incidence of commercial abuse, those data
    have not been presented to this court. I cannot agree with the unexplained view of the
    Fourth Circuit that “[i]t is eminently rational to believe that prohibiting the non-
    commercial sexual abuse of children by Americans abroad has a demonstrable effect on
    sex tourism and the commercial sex industry.” 
    Bollinger, 798 F.3d at 218
    . Contra United
    States v. Bianchi, 386 F. App’x 156, 163 (3d Cir. 2010) (Roth, J., dissenting) (“I find that
    there is no rational basis to conclude that an illicit sex act with a minor undertaken on
    foreign soil, perhaps years after legal travel and devoid of any exchange of value,
    substantially affects foreign commerce.”); Reed, 
    2017 WL 3208458
    , at *12–13 (the
    connection is “too attenuated to rationally qualify as ‘substantial.’”); United States v.
    Park, 
    297 F. Supp. 3d 170
    , 178–79 (D.D.C. 2018) (following Reed).
    In upholding the regulations in Wickard and Raich, the Supreme Court was
    dealing with fungible commodities. See 
    Raich, 545 U.S. at 26
    (“Prohibiting the intrastate
    possession or manufacture of an article of commerce is a rational (and commonly
    utilized) means of regulating commerce in that product.” (emphasis added)); 
    id. at 18
    (“Like the farmer in Wickard, respondents are cultivating, for home consumption, a
    fungible commodity for which there is an established, albeit illegal, interstate market.”
    (emphasis added)). Home-grown wheat is essentially indistinguishable from wheat
    produced for commerce, and home-grown marijuana for medical purposes is essentially
    the same product as commercial marijuana. A “customer” could not distinguish the two
    products when eating or smoking them. Here, in contrast, the government has not
    suggested that sex tourists who prey on children are indifferent to whether their victims
    39
    are provided by commercial enterprises or they must seek out their victims at places like
    mission schools and assault the children on their own.
    Nor is it enough simply to point to the substantial effect on commerce of a great
    deal of activity regulated by a statute and then justify regulation of additional activity that
    is pasted into the statute on the ground that it is “part of a larger regulation of economic
    activity.” Maj. Op. at 40, 46 (internal quotation marks omitted). The fully stated
    proposition is that conduct that otherwise could not be regulated can be regulated if it is
    “an essential part of a larger regulation of economic activity, in which the regulatory
    scheme could be undercut unless the intrastate activity were regulated.” 
    Lopez, 514 U.S. at 561
    (emphasis added). Accord 
    Raich, 545 U.S. at 24
    –25. For example, the Court in
    Wickard “had no difficulty concluding that Congress had a rational basis for believing
    that, when viewed in the aggregate, leaving home-consumed wheat outside the regulatory
    scheme would have a substantial influence on price and market conditions.” 
    Raich, 545 U.S. at 19
    . The conclusion is common sense, even obvious. In addition, the record in
    that case “made it clear that the aggregate production of wheat for [noncommercial] use
    on farms had a significant impact on market prices.” 
    Id. at 20.
    Likewise in Raich there
    were findings by Congress that in effect “established the causal connection between the
    production [of marijuana] for local use and the national market.” 
    Id. As the
    Court said,
    “that the . . . exemptions [sought by the respondents] will have a significant impact on
    both the supply and demand sides of the market for marijuana . . . is readily apparent.”
    
    Id. at 30;
    see 
    id. at 22
    (“[W]e have no difficulty concluding that Congress had a rational
    40
    basis for believing that failure to regulate the intrastate manufacture and possession of
    marijuana would leave a gaping hole in the CSA.” (emphasis added)).
    Translating that precedent to the case before us, regulation of the conduct at issue
    here is proper only if such regulation is “an essential part” of the regulation of
    commercial sex tourism because failure to control noncommercial illicit sexual conduct
    would “undercut” that regulation. Yet neither the government brief nor the panel opinion
    explains how this is the case. When products are fungible, the connection is
    commonsensical. But the tie between commercial sex with children and noncommercial
    nonconsensual sexual assault is a mystery. Nor is the mystery resolved by any findings
    by Congress, the subject to which I now turn.
    2.      Congressional Findings
    Congressional findings about the effects of the prohibited activity on commerce
    can inform the analysis. See 
    Lopez, 514 U.S. at 562
    . But they are not dispositive. For
    example, in Morrison the Court ruled that the statute providing a civil remedy to victims
    of gender-motivated violence was unconstitutional despite “numerous findings regarding
    the serious impact that gender-motivated violence has on victims and their 
    families.” 529 U.S. at 614
    . Those findings, however, relied on the types of attenuated effects between
    violence and commerce—violence deters victims from traveling interstate and engaging
    in interstate businesses, diminishes national productivity, increases medical and other
    costs, and decreases both supply of and demand for interstate products—that the Court
    had previously rejected as insubstantial because recognizing such tenuous effects would
    eliminate limits on congressional power. See 
    id. at 615
    (“Congress’ findings are
    41
    substantially weakened by the fact that they rely so heavily on a method of reasoning that
    we have already rejected as unworkable if we are to maintain the Constitution’s
    enumeration of powers.”).
    The panel opinion discusses at length the long history of federal legislation
    governing interstate and international travel for sex offenses. The great bulk of that
    history is irrelevant because it does not speak to the specific regulation at issue here. See
    
    Lopez, 514 U.S. at 563
    (“[I]mportation of previous [legislative] findings to justify [the
    challenged statutory provision] is especially inappropriate here because the prior federal
    enactments or Congressional findings do not speak to the subject matter of [the
    provision] or its relationship to interstate commerce.” (original brackets and internal
    quotation marks omitted)). Moreover, Congress made no findings when adopting the
    PROTECT Act. Congress did do so, however, in debating its failed precursor, the Sex
    Tourism Prohibition Improvement Act of 2002 (STPIA). And I will assume that a court
    can consider those findings in evaluating the constitutionality of the PROTECT Act.
    When considering STPIA, the House Judiciary Committee reported the following:
    Many developing countries have fallen prey to the serious problem
    of international sex tourism. According to the National Center for Missing
    and Exploited Children, child-sex tourism is a major component of the
    worldwide sexual exploitation of children and is increasing. There are
    more than 100 web sites devoted to promoting teenage commercial sex in
    Asia alone. Because poor countries are often under economic pressure to
    develop tourism, those governments often turn a blind eye toward this
    devastating problem because of the income it produces. Children around
    the world have become trapped and exploited by the sex tourism industry.
    There would be no need for a sex tourism statute if foreign countries
    successfully prosecuted U.S. citizens or resident aliens for the child sex
    crimes committed within their borders. However, for reasons ranging from
    ineffective law enforcement, lack of resources, corruption, and generally
    42
    immature legal systems, sex tourists often escape prosecution in the host
    countries. It is in those instances that the United States has an interest in
    pursuing criminal charges in the United States.
    The Justice Department, Federal law enforcement agencies, the State
    Department and other U.S. entities expend significant resources assisting
    foreign countries most afflicted with sex tourism to improve their domestic
    response to such criminal offenses. Our assistance encompasses informal
    as well as formal training of foreign law enforcement officers and
    prosecutors in the investigation and prosecution of sex tourism crimes. By
    and large these countries reach out to the United States for help and some
    even blame the United States for the problem, “arguing” that many of the
    sex tourists are American. Some of the foreign or “host” countries
    experiencing significant problems with sex tourism, such as Nicaragua,
    Costa Rica, Thailand and the Philippines, have requested that the United
    States act to deal with this growing problem.
    Current law requires the Government to prove that the defendant
    traveled to a foreign country with the intent to engage in sex with a minor.
    H.R. 4477 eliminates the intent requirement where the defendant completes
    the travel and actually engages in the illicit sexual activity with a minor.
    The bill also criminalizes the actions of sex tour operators by prohibiting
    persons from arranging, inducing, procuring, or facilitating the travel of a
    person knowing that such a person is traveling in interstate or foreign
    commerce for the purpose of engaging in illicit sexual conduct with a
    minor. This legislation will close significant loopholes in the law that
    persons who travel to foreign countries seeking sex with children are
    currently using to their advantage in order to avoid prosecution.
    H.R. Rep. 107-525, at 2–3 (2002).
    What is notably missing from these findings is any statement, much less evidence,
    regarding the impact of noncommercial illicit sexual activity by international travelers on
    commercial illicit sexual activity. While the above findings may support the
    constitutionality of a ban on commercial sex acts with children in foreign countries, they
    say nothing about the effects on foreign commerce of noncommercial nonconsensual
    molestation of children abroad. There were no findings that noncommercial offenses
    affect the child-sex market, or even that Congress cannot adequately control commercial
    43
    offenses unless it also prohibits noncommercial offenses. It is as if when Congress
    enacted § 2423(c) to eliminate the requirement that a defendant travel in interstate
    commerce with the intent to engage in illicit sexual conduct, it was so focused on those
    who engage in commercial illicit sexual conduct that it overlooked the impact of the
    change on the prohibition of noncommercial illicit sexual conduct.
    In its congressional-findings argument the government also relies on the Optional
    Protocol to the Convention on the Rights of the Child regarding the Sale of Children,
    Child Prostitution and Child Pornography, stating that “[t]he PROTECT Act was . . .
    passed as part of the United States’ obligation under the Optional Protocol.” Aplee. Br.
    at 60. The government apparently seeks to impute the reasons that the United States
    ratified that treaty to Congress’s decision to enact the PROTECT Act. (It does not argue
    that any part of the PROTECT Act was enacted under the authority of the Constitution’s
    Treaty Clause, U.S. Const. art. II, § 2, cl. 2.) I question whether one should consider the
    Optional Protocol in this context because Congress never mentioned it in the texts or
    legislative histories of the PROTECT Act or STPIA. But even if one were to do so, the
    government’s reliance would be misplaced. The Optional Protocol covers only
    commercial sex offenses against children; it says nothing about the effects of
    noncommercial sex offenses on foreign commerce. See Reed, 
    2017 WL 3208458
    , at *16
    (“The Optional Protocol calls on States Parties to create and enforce laws that prohibit the
    exploitation of children for commercial gain.” (emphasis added)).
    Thus, the congressional findings “do not speak to the subject matter of [the
    provision under which Defendant was convicted] or its relationship to [foreign]
    44
    commerce.” 
    Lopez, 514 U.S. at 563
    (brackets and internal quotation marks omitted)).
    This is not an inconsequential matter. Although congressional findings are not necessary
    to support commerce-clause legislation, they can be significant, “particularly when the
    connection to commerce is not self-evident.” 
    Raich, 545 U.S. at 21
    . Here, the
    connection is not self-evident. Without congressional findings, I cannot see how
    prevention of noncommercial sexual assault on children would substantially affect
    commercially provided sex abuse. See Lopez, 514 U.S at 563 (“[T]o the extent that
    congressional findings would enable us to evaluate the legislative judgment that the
    activity in question substantially affected interstate commerce, even though no such
    substantial effect was visible to the naked eye, they are lacking here.”)
    3.     Express Jurisdictional Element
    There remains the one factor that could support congressional power to punish
    Defendant’s offense under the substantial-effects rationale: “travel[ing] in foreign
    commerce or resid[ing], either temporarily or permanently, in a foreign country” is an
    express element of 18 U.S.C. § 2423(c). See United States v. Jeronimo-Bautista, 
    425 F.3d 1266
    , 1269 (10th Cir. 2005) (asking “whether the statute’s reach was limited by an
    express jurisdictional element”). “A jurisdictional hook is not, however, a talisman that
    wards off constitutional challenges.” 
    Patton, 451 F.3d at 632
    . What the Supreme Court
    has said is that “a jurisdictional element may establish that the enactment is in pursuance
    of Congress’ regulation of interstate commerce.” 
    Morrison, 529 U.S. at 612
    (emphasis
    added). As we stated in Patton, “The ultimate inquiry is whether the prohibited activity
    has a substantial effect on interstate [or foreign] commerce, and the presence of a
    45
    jurisdictional hook, though certainly helpful, is neither necessary nor 
    sufficient.” 451 F.3d at 632
    . Our opinion, see 
    id., endorsed similar
    views expressed by other circuits:
    United States v. Maxwell, 
    446 F.3d 1210
    , 1218 (11th Cir. 2006) (“[W]here a
    jurisdictional element is required, a meaningful one, rather than a pretextual incantation
    evoking the phantasm of commerce, must be offered.” (brackets, citation, and internal
    quotation marks omitted)); United States v. Holston, 
    343 F.3d 83
    , 88 (2d Cir. 2003)
    (expressing unwillingness to rely solely on “the mere existence of jurisdictional language
    purporting to tie criminal conduct to interstate commerce”); United States v. Rodia, 
    194 F.3d 465
    , 472–73 (3d Cir. 1999) (rejecting a “hard and fast rule that the presence of a
    jurisdictional element automatically ensures the constitutionality of a statute”).
    In my view, the jurisdictional hook here does not do the trick. I have already
    expressed why I believe that the government has not shown any connection between
    noncommercial illicit sexual conduct committed by Americans who traveled abroad and
    commercial illicit sexual conduct (the only type of “commerce” that it would allegedly
    affect). More important are the ramifications of relying on this jurisdictional hook. I do
    not see, nor has the government provided, a principled way to distinguish the use of this
    hook to justify the statutory provisions under which Defendant was convicted from the
    use of an identical hook that would permit Congress to prohibit any misconduct by
    Americans abroad, from gambling (even if lawful in the country where conducted) to
    jaywalking. All that would be needed is to add the hook that the defendant had traveled
    in foreign commerce. At the least there should be evidence or a congressional finding,
    46
    not just speculation, of a direct, not “attenuated,” effect on commercial activity.
    
    Morrison, 529 U.S. at 615
    .
    True, Patton recognized the tension between the analysis of the Interstate
    Commerce Clause in Lopez and Morrison and the Supreme Court’s decision in
    Scarborough v. United States, 
    431 U.S. 563
    , 565 (1977), “which held that Congress
    intended a felon-in-possession statute to prohibit possession of any firearm that had
    moved in interstate commerce,” 
    Patton, 451 F.3d at 634
    . Scarborough implicitly
    accepted that such a prohibition was constitutional. See 
    id. Feeling bound
    by
    Scarborough, this court upheld the constitutionality of a statute that prohibited “the
    intrastate possession by a felon of a bulletproof vest, in the absence of any commercial
    transaction or any evidence of a connection to commercial activity other than the fact
    that, before it was lawfully purchased by the defendant, the vest had been sold across a
    state line,” even though the prohibition could not be justified under the Supreme Court’s
    “three-part test for determining the reach of the Commerce Clause.” 
    Id. at 618–19.
    But Scarborough cannot be extended so far as to encompass the statute before us.
    The jurisdictional hook in Scarborough was interstate travel by a commodity, not by a
    person, and certainly not by a person like Defendant—who had not engaged in any
    activity before or during the travel that would distinguish him or her from any other
    person. If Scarborough stands for the proposition that the Interstate Commerce Clause
    authorizes Congress to prohibit any activity occurring after personal travel in interstate
    commerce, then it provides a general police power to the federal government that would
    47
    erase the “distinction between what is truly national and what is truly local.” 
    Lopez, 514 U.S. at 567
    –68. I am confident that such a result was not the teaching of Scarborough.
    To sum up, there can be little question that a statutory provision otherwise
    identical to the one on which Defendant was convicted could not pass muster under the
    Interstate Commerce Clause if travel in interstate commerce were substituted for travel in
    foreign commerce. He did not engage in economic activity, and there is no reason to
    believe that activity like his has a substantial effect on commerce. Nor can the provision
    be upheld under the Foreign Commerce Clause merely on the unfocused proposition that
    congressional power under that clause is greater than the power provided by the Interstate
    Commerce Clause. To uphold the provision, the Foreign Commerce Clause would need
    to be interpreted to confer congressional power to regulate all conduct of Americans
    while abroad. Nothing suggests that the Framers had any such concept of the Clause; on
    the contrary, the evidence suggests that such power would seem most strange to them.
    Moreover, such a power would be wholly inappropriate under a Constitution of
    conferred, limited power.
    I therefore would hold that the statutory provisions under which Defendant was
    convicted cannot be justified under the Foreign Commerce Clause. At the very least, §
    2423(c) is unconstitutional as applied in this case. Not only is it uncontroverted that
    Defendant was not a sex tourist, he was not even a tourist. The government does not
    suggest that he had any tie to commercial sex trafficking. The connection between his
    kind of offense and sex tourism is far too attenuated to support regulation under the
    Foreign Commerce Clause.
    48
    I agree with Judge Ferguson: “The sexual abuse of children abroad is despicable,
    but we should not, and need not, refashion our Constitution to address it.” 
    Clark, 435 F.3d at 1117
    (9th Cir. 2006) (Ferguson, J., dissenting); see Reed, 
    2017 WL 3208458
    , at
    *11, *19 (holding § 2423(c) unconstitutional as applied to a defendant who molested his
    daughter while residing abroad); 
    Park, 297 F. Supp. 3d at 178
    –79 (following Reed); see
    also 
    Al-Maliki, 787 F.3d at 792
    –94 (upholding this portion of the statute on plain-error
    review, but suggesting that the panel majority would have held it unconstitutional if the
    issue had been preserved); United States v. Bianchi, 386 F. App’x 156, 163 (3d Cir.
    2010) (Roth, J., dissenting) (“I find that there is no rational basis to conclude that an
    illicit sex act with a minor undertaken on foreign soil, perhaps years after legal travel and
    devoid of any exchange of value, substantially affects foreign commerce.”); cf. 
    Baston, 137 S. Ct. at 850
    (Thomas, J., dissenting from denial of petition for certiorari in criminal
    prosecution under Foreign Commerce Clause) (“We should grant certiorari and reaffirm
    that our Federal Government is one of limited and enumerated powers, not the world’s
    lawgiver.”); Colangelo supra at 1039–40 (doubting the constitutionality of § 2423(c) with
    respect to noncommercial sexual abuse of minors).
    The Supreme Court has provided little, if any, guidance regarding congressional
    power under the Foreign Commerce Clause to regulate the conduct of Americans abroad.
    If the Court believes that it is appropriate to cabin that power, this may be as good a
    vehicle as any to convey the message.
    For the above reasons, I respectfully dissent.
    49