United States v. Diggins ( 2022 )


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  •           United States Court of Appeals
    For the First Circuit
    Nos. 20-2078, 20-2079
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    MAURICE DIGGINS,
    Defendant-Appellant.
    APPEALS FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MAINE
    [Hon. Nancy Torresen, U.S. District Judge]
    Before
    Lynch, Thompson, and Gelpí,
    Circuit Judges.
    William T. Murphy, on brief for appellant.
    Darcie N. McElwee, United States Attorney; Benjamin Block,
    Assistant United States Attorney; Kristen Clarke, Assistant
    Attorney General; Pamela S. Karlan, Principal Deputy Assistant
    Attorney General; and Thomas Chandler and Brant S. Levine,
    Attorneys, Appellate Section, Department of Justice, on brief for
    appellee.
    June 8, 2022
    GELPÍ, Circuit Judge.      A jury convicted Maurice Diggins
    ("Diggins") of two counts of committing a hate crime and one count
    of conspiring to commit a hate crime under the Matthew Shepard and
    James Byrd, Jr. Hate Crimes Prevention Act (the "Shepard-Byrd
    Act"), 
    18 U.S.C. §§ 249
    (a)(1), 371.1 On appeal, Diggins challenges
    Congress's ability under § 2 of the Thirteenth Amendment to pass
    § 249(a)(1),   contending    that   the   Supreme   Court's    expansive
    articulation of § 2 authority in Jones v. Alfred H. Mayer Co., 
    392 U.S. 409
     (1968), has been curtailed or overruled by the Court's
    subsequent decisions in City of Boerne v. Flores, 
    521 U.S. 507
    (1997), and Shelby County v. Holder, 
    570 U.S. 529
     (2013).              He
    further   asserts   that   the   government   failed   to   satisfy   the
    procedural requirements of 
    18 U.S.C. § 249
    (b)(1).       Lastly, Diggins
    contests the admission into evidence of his white-supremacist
    tattoos and expert testimony relating to the same.          We affirm the
    judgment of the district court, holding that Diggins's first two
    arguments are unavailing and the third argument has been waived.
    1 In pertinent part, 
    18 U.S.C. § 249
    (a)(1) makes it a crime
    to "willfully cause[] bodily injury to any person . . . because of
    the actual or perceived race, color, religion, or national origin
    of any person." 
    18 U.S.C. § 371
    , in turn, proscribes "two or more
    persons conspir[ing] . . . to commit any offense against the
    United States" where "one or more of such persons do any act to
    effect the object of the conspiracy."
    - 2 -
    BACKGROUND
    I. The Attacks
    On the night of April 15, 2018, Diggins and his nephew
    violently attacked two Black men in separate incidents.           In each
    attack, Diggins and his nephew hurled racial slurs at their target,
    striking him in the head and shattering his jaw.            Both victims
    suffered serious injuries which required emergency surgery and
    hospitalization.      They   continue    to   suffer   lasting   physical,
    emotional, and financial consequences.
    In the first attack, Diggins and his nephew approached
    A.N., a Black man and Sudanese refugee who was quietly smoking on
    the sidewalk outside a bar in Portland, Maine.           Diggins and his
    nephew are both white men, with Diggins being the taller and larger
    of the two.    Neither man had ever met A.N. before.         Without any
    provocation, and before A.N. was able to react, Diggins punched
    A.N. in the face.    A.N. fled, bloodied and in pain, pursued by the
    smaller man.     As A.N. escaped, he heard someone yell behind him,
    "[C]ome here, nigger, come here, nigger."       A.N. required emergency
    surgery for his broken jaw the following day at the Maine Medical
    Center.   The surgeon implanted a metal plate into A.N.'s jaw and
    wired it shut for several weeks, during which time he was unable
    to eat, work, or even hold his infant daughter.
    Later that evening, Diggins and his nephew drove to a 7-
    Eleven in Biddeford, Maine, where D.M., a Black man, had gone to
    - 3 -
    buy snacks. D.M. had never encountered Diggins or his nephew prior
    to that evening.       Diggins sped into the parking lot and pulled up
    toward   D.M.,   who    was    on    foot,     yelling,   "[N]igger,     who   you
    eyeballing?"       Diggins         proceeded      to   exit   his   vehicle    and
    aggressively approach D.M., distracting him while Diggins's nephew
    came from behind the vehicle and punched D.M. in the face.                     The
    force of the punch broke D.M.'s jaw and knocked him to the ground.
    D.M. testified that after he fell, Diggins punched him in the back
    of his head.     Suffering "unexplainable" pain and fearing for his
    life, D.M. fled.        As Diggins or his nephew laughed, Diggins's
    nephew pursued him on foot, yelling, "un, nigger."                  Subsequently,
    Diggins and his nephew re-entered their vehicle and drove in D.M.'s
    direction, shouting, "We're going to find you, nigger."
    The next day, D.M. underwent emergency surgery at the
    Maine Medical Center, where his jaw was wired shut.                  In the weeks
    following the attack, D.M. lost both of his jobs and incurred
    substantial medical expenses.          As a consequence, he has also faced
    financial    challenges       as    well     as   long-lasting      physical   and
    psychological harm.
    II. Procedural History
    Following an initial federal indictment in August 2018,
    a grand jury in March 2019 returned a superseding indictment
    charging Diggins and his nephew with two counts of committing a
    hate crime in violation of 
    18 U.S.C. § 249
    (a)(1) and one count of
    - 4 -
    conspiring to commit a hate crime in violation of 
    18 U.S.C. §§ 249
    (a)(1)(A), 371.2             Along with the indictment, the Assistant
    Attorney General for the Civil Rights Division filed a certificate
    pursuant      to    
    18 U.S.C. § 249
    (b)(1)    averring     that   prosecuting
    Diggins and his nephew for violating § 249 would be "in the public
    interest and necessary to secure substantial justice."3                    Diggins
    moved    to   dismiss      the     superseding    indictment,    challenging    the
    constitutionality          of      
    18 U.S.C. § 249
    (a)(1)    and    separately
    contending that the certification did not satisfy the requirements
    of 
    18 U.S.C. § 249
    (b)(1).4                The district court rejected both
    arguments.         United States v. Diggins, 
    435 F. Supp. 3d 268
     (D. Me.
    2019).    Diggins also filed a pretrial motion in limine to exclude
    evidence and expert testimony relating to certain of his tattoos
    associated         with    white-supremacist       ideology,     including     four
    swastikas, two lightning bolts associated with the Nazi SS, the
    letters "WPWW" (referring to "White Pride World Wide"), and an
    image of an Absolut Vodka bottle containing the phrases "white
    2 Diggins was initially charged in state court for conspiracy
    to commit aggravated assault in violation of Maine law, but said
    criminal action was later dismissed following Diggins's federal
    indictment.
    3 That statement, subparagraph (D) of § 249(b)(1), is one of
    four grounds the Assistant Attorney General may offer as reason to
    invoke the federal prosecutorial power. We discuss the Assistant
    Attorney General's certification infra Section I.D and Part II.
    4 Diggins's nephew subsequently pleaded guilty.                   Hence, this
    appeal pertains only to Diggins.
    - 5 -
    pride" and "We must secure the existence of our people and a future
    for white children."   The district court denied the motion, and at
    trial the expert witness testified that Diggins's tattoos are
    extensively    associated   with    extremist   and   white-supremacist
    ideologies.    A jury subsequently convicted Diggins on all charges,
    and Diggins was sentenced to 60 months' imprisonment for the
    conspiracy charge and 120 months' imprisonment for each hate crime
    charge, to be served concurrently.         At sentencing, the court
    stressed the gravity of Diggins's conduct, noting that his "crimes
    were among the most serious that [the court] ha[s] ever seen" and
    highlighting the severe impact of his "bigotry, ignorance, and
    violence" both on his direct victims and the "entire minority
    community."
    On appeal, Diggins does not dispute that he attacked
    both A.N. and D.M. because of their race, to wit, the basis of his
    conviction.5    Rather, he challenges the constitutionality of 
    18 U.S.C. § 249
    (a)(1) and asserts deficiencies in the certification
    process pursuant to 
    18 U.S.C. § 249
    (b)(1).        Diggins also appears
    to challenge the denial of his motion to suppress evidence and
    5 The record evidences that Diggins did not object at trial
    to the jury instructions pertaining to whether his actions
    satisfied the elements of § 249(a)(1), or to the verdict form used.
    On appeal, he makes no claims as to these matters, nor does he
    challenge his sentence.
    - 6 -
    expert testimony relating to his tattoos, although he does not
    mention the issue in the Argument section of his opening brief.
    DISCUSSION
    Congress exercised its enforcement powers under § 2 of
    the   Thirteenth      Amendment       to    enact    
    18 U.S.C. § 249
    (a)(1),       a
    provision    of     the   Shepard-Byrd        Act,    under       which    Diggins    was
    convicted.          The    government         contends        said        provision    is
    constitutional under the rational-determination test the Supreme
    Court articulated in Jones v. Alfred H. Mayer Co., 
    392 U.S. 409
    (1968), to evaluate legislation enacted under § 2 of the Thirteenth
    Amendment.    Diggins disagrees and contends that § 249(a)(1) fails
    the Jones test.           He further contends that the constitutional
    landscape established by Jones has been eroded by the Supreme
    Court's subsequent decisions in City of Boerne v. Flores, 
    521 U.S. 507
     (1997), and Shelby County v. Holder, 
    570 U.S. 529
     (2013), which
    dealt with the Fourteenth and Fifteenth Amendments, respectively.
    He avers that the same federalism concerns driving those cases are
    presented here, and we should therefore apply the tests articulated
    there   --   as     opposed     to    that    in    Jones    --    to     evaluate    the
    constitutionality of § 249(a)(1).                  We reject Diggins's arguments
    here,   as   well    as   his   two    others,       for    the    reasons    discussed
    seriatim.
    - 7 -
    I. Constitutionality of 
    18 U.S.C. § 249
    (a)(1)
    A.       Standard of Review
    We review the constitutionality of federal statutes de
    novo.      See United States v. Booker, 
    644 F.3d 12
    , 22 (1st Cir.
    2011).
    B.       The Thirteenth Amendment Enforcement Power Under Jones
    Our     analysis      begins      by        reviewing     the     Thirteenth
    Amendment's enforcement power.               Ratified in the wake of the Civil
    War, the Thirteenth Amendment declares in its first section that
    "[n]either      slavery       nor     involuntary          servitude,     except    as    a
    punishment for crime whereof the party shall have been duly
    convicted, shall exist within the United States, or any place
    subject to their jurisdiction."                    U.S. Const. amend. XIII, § 1.
    Section Two provides that "Congress shall have power to enforce
    this article by appropriate legislation."                       Id. § 2.6         Uniquely
    among the Reconstruction Amendments, the Thirteenth Amendment's
    Enforcement         Clause    lacks     a    state-action        provision,        instead
    empowering Congress to directly regulate private conduct.                          See The
    Civil      Rights    Cases,   
    109 U.S. 3
    ,     20    (1883)     (noting    that    § 2
    The wording of Section Two alludes to the Supreme Court's
    6
    language in McCulloch v. Maryland, 17 U.S. (4 Wheat.) 316, 421
    (1819) ("Let the end be legitimate, let it be within the scope of
    the constitution, and all means which are appropriate, which are
    plainly adapted to that end, which are not prohibited, but consist
    with   the   letter   and  spirit   of   the   constitution,   are
    constitutional." (emphasis added)).     See Jack M. Balkin, The
    Reconstruction Power, 
    85 N.Y.U. L. Rev. 1801
    , 1810 & n.34 (2010).
    - 8 -
    authorizes      legislation    that    is   "primary       and   direct      in    its
    character; for the amendment is not a mere prohibition of State
    laws       establishing   or   upholding        slavery,     but    an      absolute
    declaration that slavery or involuntary servitude shall not exist
    in any part of the United States"); Griffin v. Breckenridge, 
    403 U.S. 88
    , 105 (1971) ("[T]here has never been any doubt of the power
    of Congress to impose liability on private persons under § 2 of
    th[e Thirteenth] [A]mendment . . . .").
    Modern Thirteenth Amendment jurisprudence dates back
    fifty-four years to Jones, which reconsidered an earlier line of
    post-Reconstruction       caselaw     wherein    the   Supreme      Court    took    a
    narrower      view   of   Congress's    enforcement        powers    under        § 2.7
    Adopting in substantial measure Justice John Marshall Harlan's
    Beginning with the 1888 Civil Rights Cases, the Court
    7
    affirmed that § 2, in theory, "clothes Congress with power to pass
    all laws necessary and proper for abolishing all badges and
    incidents of slavery in the United States."      The Civil Rights
    Cases, 
    109 U.S. at 20
    .        In practice, however, the Court
    consistently invalidated legislation enacted under the Thirteenth
    Amendment, adopting a highly restrictive interpretation of the
    "badges and incidents of slavery."    See 
    id. at 20, 22
     (holding
    that § 2 did not authorize passage of the Civil Rights Act of
    1875); Plessy v. Ferguson, 
    163 U.S. 537
    , 542 (1896) (determining
    that segregation "cannot be justly regarded as imposing any badge
    of slavery"), overruled by Brown v. Bd. of Educ., 
    347 U.S. 485
    (1954); Hodges v. United States, 
    203 U.S. 1
    , 8 (1906) (holding
    that § 2 only empowers Congress to outlaw private conduct so
    extreme as to impose "the state of entire subjection of one person
    to the will of another"), overruled in part by Jones, 
    392 U.S. 409
    .
    - 9 -
    dissents in those cases,8 Jones reassessed the scope of Congress's
    ability to legislate against the "badges and incidents of slavery,"
    affirming that § 2 "empower[s] Congress to do much more" than
    merely effect the abolition of slavery announced in § 1.            Jones,
    
    392 U.S. at 439
    .
    Jones    concerned   a    challenge   to   
    42 U.S.C. § 1982
    ,
    originally passed as a provision of the Civil Rights Act of 1866,
    which forbids racial discrimination in the lease and sale of
    private property.    As described by Senator Lyman Trumbull, who
    authored the Thirteenth Amendment and first introduced the Civil
    8  In a series of vociferous dissents, Justice Harlan
    excoriated the Court's restrictive reading of § 2. See The Civil
    Rights Cases, 
    109 U.S. at 26
     (Harlan, J., dissenting) ("The opinion
    in these cases proceeds, as it seems to me, upon grounds entirely
    too narrow and artificial. The substance and spirit of the recent
    amendments of the Constitution have been sacrificed by a subtle
    and ingenious verbal criticism."); Plessy, 
    163 U.S. at 562
     (Harlan,
    J., dissenting) ("The arbitrary separation of citizens, on the
    basis of race, while they are on a public highway, is a badge of
    servitude wholly inconsistent with the civil freedom and the
    equality before the law established by the constitution.");
    Hodges, 
    203 U.S. at 37-38
     (Harlan, J., dissenting) ("The
    interpretation now placed on the 13th Amendment is . . . entirely
    too narrow, and is hostile to the freedom established by the
    Supreme Law of the land."); see also United States v. Nelson, 
    277 F.3d 164
    , 181-83 (2d Cir. 2002) (summarizing the evolution in
    caselaw from the Civil Rights Cases to Jones and concluding that
    "Justice   Harlan's   reading   of   the   Thirteenth   Amendment's
    enforcement clause, including, critically, his account of the
    scope of congressional discretion under that clause, has in
    principal part prevailed"). For a historical account of Justice
    Harlan's dissents in the Court's post-Reconstruction caselaw, see
    generally Peter S. Canellos, The Great Dissenter: The Story of
    John Marshall Harlan, America's Judicial Hero 256-70, 329-51
    (2021).
    - 10 -
    Rights Act of 1866 on the Senate floor, the Act was "intended to
    give effect" to the Thirteenth Amendment's guarantee of liberty,
    "secur[ing] to all persons within the United States practical
    freedom." Jones, 
    392 U.S. at 431
     (quoting Cong. Globe, 39th Cong.,
    1st Sess. 474 (1866) (statement of Sen. Trumbull)); see also Jett
    v. Dall. Indep. Sch. Dist., 
    491 U.S. 701
    , 714-22 (1989) (recounting
    the passage of the Act and extensively quoting Senator Trumbull);
    Springer v. Seaman, 
    821 F.2d 871
    , 881 (1st Cir. 1987) (noting that
    the "unequivocal language" and "legislative history" of the Civil
    Rights Act of 1866 "manifests Congress' purpose to enact sweeping
    legislation implementing the [T]hirteenth [A]mendment to abolish
    all the remaining badges and vestiges of the slavery system"
    (quotation omitted)), abrogated on other grounds by Jett, 
    491 U.S. 701
    .
    In reconstructing the meaning and scope of § 2 of the
    Thirteenth    Amendment,   the   Jones    Court   closely   examined     the
    legislative history of the Civil Rights Act, quoting at length
    Senator   Trumbull's   description   of    the    "fair   meaning   of   the
    amendment":
    I   have    no    doubt   that    under   this
    provision . . . we may destroy all these
    discriminations in civil rights against the
    black   man;    and    if  we    cannot,   our
    constitutional amendment amounts to nothing.
    It was for that purpose that the second clause
    of that amendment was adopted, which says that
    Congress shall have authority, by appropriate
    legislation, to carry into effect the article
    - 11 -
    prohibiting slavery.    Who is to decide what
    that appropriate legislation is to be?     The
    Congress of the United States; and it is for
    Congress to adopt such appropriate legislation
    as it may think proper, so that it be a means
    to accomplish the end.
    Jones, 
    392 U.S. at 440
     (alteration in original) (quoting Cong.
    Globe, 39th Cong., 1st Sess. 322 (statement of Sen. Trumbull)).
    Endorsing Senator Trumbull's interpretation, the Court announced
    a   very   broad    standard    to    evaluate     legislation   passed   under
    Congress's § 2 authority:             "Surely Senator Trumbull was right.
    Surely Congress has the power under the Thirteenth Amendment
    rationally to determine what are the badges and the incidents of
    slavery, and the authority to translate that determination into
    effective legislation."         Id.   Applying this rational-determination
    framework, the Court held that racial discrimination in sales and
    leases of property constituted "a relic of slavery."                Id. at 440-
    43.        Accordingly,    the        Court     held   that   Congress    acted
    rationally -- and thus, constitutionally -- in exercising its § 2
    authority to proscribe such discrimination.              Under Jones, so long
    as Congress rationally determines that conduct is a "badge" or
    "incident" of slavery, statutes passed in reliance on Congress's
    § 2 authority pass constitutional muster.              Jones, 
    392 U.S. at 440
    .
    The Fourth Circuit recently held that "Jones remains the
    seminal Supreme Court case on Congress's enforcement power under
    § 2   of   the     Thirteenth    Amendment,"      providing   the   "governing
    - 12 -
    standard"   for     challenges    to    legislation     enacted       thereunder.
    United States v. Roof, 
    10 F.4th 314
    , 392 (4th Cir. 2021), petition
    for cert. filed, No. 21-7234 (U.S. Feb. 24, 2022).                        Indeed,
    subsequent Supreme Court caselaw has repeatedly reaffirmed that
    § 2 vests Congress with authority to legislate against racial
    discrimination and violence in a variety of contexts, and that
    courts are to review such legislation under Jones's rational-
    determination      standard.     See,   e.g.,    Tillman      v.    Wheaton-Haven
    Recreation Ass'n, 
    410 U.S. 431
    , 435 (1973) (Jones extends to the
    racially discriminatory membership policy of a local swimming
    club); Runyon v. McCrary, 
    427 U.S. 160
    , 168, 179 (1976) (§ 2
    enables legislation prohibiting racial discrimination in private
    contracts);    Breckenridge,      
    403 U.S. at
      104-05   (§ 2     authorizes
    creation of a private right of action for victims of conspiracies
    to be deprived of privileges and immunities or equal protection of
    the laws); Patterson v. McLean Credit Union, 
    491 U.S. 164
    , 171
    (1988) (reaffirming Runyon).
    C.   
    18 U.S.C. § 249
    (a)(1) Is Constitutional Under Jones
    Applying Jones's rational-determination standard, which
    Diggins concedes is "controlling" of and "binding" on his case, we
    conclude    that    § 249(a)(1)    is    a     constitutional        exercise   of
    Congress's power under the Thirteenth Amendment.                   In so holding,
    we are joined by every other circuit to have considered the
    question.     See Roof, 10 F.4th at 392; United States v. Metcalf,
    - 13 -
    
    881 F.3d 641
    , 645 (8th Cir. 2018); United States v. Cannon, 
    750 F.3d 492
    , 502 (5th Cir.), cert. denied, 
    574 U.S. 1029
     (2014);
    United States v. Hatch, 
    722 F.3d 1193
    , 1204-05 (10th Cir. 2013),
    cert. denied, 
    572 U.S. 1018
     (2014); United States v. Maybee, 
    687 F.3d 1026
    , 1031 (8th Cir.), cert. denied, 
    568 U.S. 991
     (2012).
    In 2009, Congress passed the Shepard-Byrd Act to combat
    hate crimes motivated by race and other protected characteristics.
    Diggins was convicted of violating a provision of the Act codified
    at 18 U.S.C § 249(a)(1), which in relevant part makes it illegal
    to "willfully cause[] bodily injury to any person . . . because of
    the actual or perceived race, color, religion, or national origin
    of any person."       Congress expressly relied on its authority under
    § 2   in   enacting    § 249(a)(1),   determining   in   its    legislative
    findings of fact that "eliminating racially motivated violence is
    an important means of eliminating, to the extent possible, the
    badges,    incidents,     and   relics   of   slavery    and    involuntary
    servitude."    
    34 U.S.C. § 30501
    (7).     Congress       thus   passed
    § 249(a)(1) in recognition of the intrinsic and inconvertible
    connections between racial violence and slavery:
    For generations, the institutions of slavery and
    involuntary servitude were defined by the race,
    color, and ancestry of those held in bondage.
    Slavery and involuntary servitude were enforced,
    both prior to and after the adoption of the 13th
    amendment to the Constitution of the United States,
    through widespread public and private violence
    directed at persons because of their race, color,
    or ancestry, or perceived race, color, or ancestry.
    - 14 -
    Id.
    As   "over   a    century   of    sad   history"       demonstrates,
    "concluding there is a relationship between slavery and racial
    violence 'is not merely rational, but inescapable.'"                  Roof, 10
    F.4th at 392 (quoting United States v. Beebe, 
    807 F. Supp. 2d 1045
    ,
    1052 (D.N.M. 2011), aff'd sub nom. Hatch, 
    722 F.3d 1193
    ); see also
    United States v. Nelson, 
    277 F.3d 164
    , 189-90 (2d Cir. 2002)
    (summarizing    a   wealth    of     scholarship     on     the    "indubitable
    connections . . . between American slavery and private violence"
    and concluding that proscribing "private violence motivated by the
    victim's   race . . . falls        comfortably     within    Congress's"    § 2
    authority).     Racial subjugation through physical violence was
    indispensable to maintaining slavery.         See Hatch, 722 F.3d at 1206
    (noting that antebellum courts recognized "unrestrained master-
    on-slave violence as one of slavery's most necessary features" and
    collecting sources); State v. Mann, 
    13 N.C. (2 Dev.) 263
    , 266-67
    (1829) (characterizing "uncontrolled authority over the body" as
    "inherent in the relation of master and slave").                   Indeed, the
    violence in the record before us -- attacks against two Black men
    born of white-supremacist ideology -- constitutes the paradigmatic
    "badge and incident" or "relic of slavery" that the Thirteenth
    Amendment exists to eliminate.         Jones, 
    392 U.S. at 441, 443
    .          As
    such, we join every other circuit to have evaluated the provision
    - 15 -
    to conclude that § 249(a)(1) constitutes "appropriate legislation"
    under § 2.
    Despite overwhelming judicial consensus, Diggins urges
    that       we   forge     a    separate   path   and   adopt   a   more   restricted
    interpretation            of     Jones,    arguing     that    a     straightforward
    application          of       the   rational-determination         standard     might
    countenance all manner of purported legislative overreaching.                      To
    this end, Diggins cites the Tenth Circuit's dicta in Hatch stating
    that a wide range of conduct could hypothetically "be analogized
    to slavery" and be "thereby labeled a badge or incident of slavery
    under Jones's rational determination test," if the latter were
    taken at face value.             Hatch, 722 F.3d at 1204.      Diggins appears to
    insist on reading Jones narrowly to invalidate § 249(a)(1), either
    as an exercise in irrational              policymaking, or "as applied" to his
    conduct.9
    We   are       wholly   unpersuaded.     As    the    Tenth   Circuit
    explained in Hatch, regardless of the facial breadth of Jones,
    § 249(a)(1) adopts "a limited approach to badges-and-incidents"
    that "focuses on three connected considerations: (1) the salient
    Diggins does not allege that the government failed to prove
    9
    the elements of § 249(a)(1) beyond a reasonable doubt, so the
    nature of his "as applied" challenge -- by which he purports to
    distinguish cases such as Roof -- is unclear.       To the extent
    Diggins argues here that the government erred in choosing to
    prosecute him under § 249(a)(1), his claim merely restates his
    separate challenge to the certification process of § 249(b)(1),
    which we consider and reject infra Part II.
    - 16 -
    characteristic of the victim, (2) the state of mind of the person
    subjecting the victim to some prohibited conduct, and (3) the
    prohibited conduct itself." Id. at 1205-06. Accordingly, Congress
    drafted § 249(a)(1) to extend "only to persons who embody a trait
    that equates to 'race' as that term was understood in the 1860."
    Id. at 1206.10   Section 249(a)(1) further requires a clear nexus
    between the protected characteristic and the prohibited conduct,
    covering only violence that occurs "because of" the victim's
    "actual or perceived race, color, religion, or national origin."
    
    18 U.S.C. § 249
    (a)(1).     Finally, this provision only targets
    conduct -- "willfully cause[d] bodily injury" -- whose connection
    to slavery is, as we just detailed, beyond contestation.   Id.; see
    Roof, 10 F.4th at 392; Nelson, 
    277 F.3d at 189-90
    .
    10 While § 249(a)(1) covers "religion" and "national origin"
    in addition to "race" and "color," Congress was careful to note in
    its legislative findings that "at the time when the 13th, 14th,
    and 15th amendments to the Constitution of the United States were
    adopted, and continuing to date, members of certain religious and
    national origin groups were and are perceived to be distinct
    'races.'" 
    34 U.S.C. § 30501
    (8). Thus, "at least to the extent
    such religions or national origins were regarded as races at the
    time of the adoption of the 13th, 14th, and 15th amendments to the
    Constitution," Congress concluded that "prohibit[ing] assaults on
    the basis of real or perceived religions or national origins"
    similarly served to eliminate the "badges, incidents, and relics
    of slavery."   Id.; see Shaare Tefila Congregation v. Cobb, 
    481 U.S. 615
    , 617 (1987) (noting that 19th-century "definitions of
    race . . . were not the same as they are today," frequently
    encompassing characteristics better understood today as matters of
    religion or national origin); Saint Francis Coll. v. Al-Khazraji,
    
    481 U.S. 604
    , 610-13 (1987).
    - 17 -
    In sum, § 249(a)(1) employs a conservative framework,
    solicitous of the "limiting principles to congressional authority"
    under Jones, for evaluating whether conduct perpetuates a badge or
    incident of slavery.     Hatch, 722 F.3d at 1205.    To be clear, the
    Tenth Circuit expressly disclaimed holding that this tripartite
    approach is required by Jones, id. at 1206, and likewise we do not
    hold so here.     It suffices that § 249(a)(1) exists well within the
    parameters of the test articulated in Jones.        As such, Diggins's
    attempts to invoke the specter of unbridled § 2 authority fail,
    because the phantasm of overzealous enforcement does not haunt the
    provision at issue.       By any measure, Congress's judgment that
    racially motivated violence constitutes one of the badges and
    incidents    of    slavery   easily   satisfies   Jones's    rational-
    determination test.
    D. Section 249(a)(1) Does Not Implicate Federalism Concerns
    Perhaps recognizing his fate under Jones, Diggins also
    contends that the analyses in the Supreme Court's decisions in
    City of Boerne v. Flores, 
    521 U.S. 507
     (1997), and Shelby County
    v. Holder, 
    570 U.S. 529
     (2013), effectively render Jones a dead
    letter.11   We are in no position to overrule binding Supreme Court
    11 In support of this argument, Diggins points to cautionary
    language about Jones in Judge Elrod's special concurrence in Cannon
    and highlights dicta to similar effect in Hatch. See Cannon, 750
    F.3d at 514 (Elrod, J., specially concurring) (asserting that cases
    such as City of Boerne and Shelby County expose "tensions between
    several    lines   of    the   Supreme    Court's    constitutional
    - 18 -
    precedent.        See United States v. McIvery, 
    806 F.3d 645
    , 653 (1st
    Cir. 2015) ("Unless and until the Supreme Court overrules [its
    precedent], we must continue to adhere to it." (citing Rodríguez
    de Quijas v. Shearson/Am. Express, Inc., 
    490 U.S. 477
     (1989))).
    Regardless, we absolutely disagree with Diggins's postulation.
    We start our analysis with City of Boerne, whose backdrop
    begins with Sherbert v. Verner, 
    374 U.S. 398
    , 402-03 (1963), in
    which     the    Supreme    Court   held   that   governmental    actions   that
    substantially burden a religious practice must be justified by a
    compelling governmental interest, i.e., strict scrutiny.12                  Then,
    in Employment Division v. Smith, 
    494 U.S. 872
     (1990), the Supreme
    Court limited the applicability of the Sherbert test and held that
    free exercise challenges to neutral, generally applicable laws are
    subject only to rational basis review.               See Smith, 
    494 U.S. at 888-90
     (1990). Responding to Smith, Congress enacted the Religious
    Freedom Restoration Act, commonly known as RFRA.               Pub. L. 103-141,
    
    107 Stat. 1488
     (1993) (codified at 42 U.S.C §§ 2000bb to bb-4).
    Congress        expressly   crafted    RFRA    "to   restore   the   compelling
    jurisprudence"); Hatch, 722 F.3d at 1204-05 (speculating that
    "broad use of Section 2 power . . . would arguably raise the sort
    of federalism concerns articulated in City of Boerne"). For the
    reasons stated below, we flatly reject any notion that City of
    Boerne and Shelby County cast doubt on Jones's reasoning.
    12 In practice, application of the Sherbert test was more
    nuanced.   See generally Eugene Volokh, A Common-Law Model for
    Religious Exemptions, 
    46 UCLA L. Rev. 1465
    , 1494-1501 (1999).
    - 19 -
    interest test as set forth in Sherbert . . . and Wisconsin v.
    Yoder, 
    406 U.S. 205
     (1972)" and to abrogate Smith, see 42 U.S.C
    § 2000bb(a)(4)-(5), (b)(1), and thus supplied a rule of decision
    for constitutional free exercise claims.             RFRA prohibited both the
    federal   government    and    state    governments      from   "substantially
    burden[ing] a person's exercise of religion even if the burden
    results from a rule of general applicability, except" when the
    government    could    show    that    the     burden   was   the   "the   least
    restrictive    means    of    furthering       [a]   compelling     governmental
    interest."    See id. § 2000bb-1(a), (b).
    City of Boerne held RFRA unconstitutional as applied to
    states.   The analysis turned on two separation of powers issues,
    one horizontal and one vertical.             See 
    521 U.S. at 517-520
    .          The
    horizontal issue was whether Congress could define the substance
    of the rights protected by the Fourteenth Amendment.                    See 
    id.
    Examining the amendment's structure, ratification history, and
    subsequent caselaw, the Court held that Congress could not do so.
    See 
    id. at 520-25
    .       Section 5 of the Fourteenth Amendment, the
    Court   explained,     affords   Congress       an   "enforcement     power"   of
    "remedial and preventive nature," 
    id.
     at 524 (citing The Civil
    Rights Cases), not the power to define the substantive scope of
    the rights defined by § 1 of that Amendment and enforce the same
    against the states, id. at 527-29. The Court grounded this holding
    in its extensive recounting of the ratification history of the
    - 20 -
    amendment, finding that          "[t]he Fourteenth Amendment's history
    confirms the remedial, rather than substantive, nature of the
    Enforcement Clause."          Id. at 520.      Equally, the Court emphasized
    that     the        limited     "nature        of      Congress'       enforcement
    power . . . w[as]         confirmed    in      our    earliest     cases   on   the
    Fourteenth Amendment."         Id. at 524.      "If Congress could define its
    own powers by altering the Fourteenth Amendment's meaning, no
    longer      would   the    Constitution      be      'superior     paramount    law,
    unchangeable by ordinary means.'"              Id. at 529 (quoting Marbury v.
    Madison, 5 U.S. (1 Cranch) 137, 177 (1803)).                     Not only would a
    substantive, rather than remedial, interpretation of § 5 upset the
    judiciary's authority to interpret the Constitution, it would also
    allow Congress to trample on the states.                   See id. at 527 (citing
    Oregon v. Mitchell, 
    400 U.S. 112
     (1970)).
    The Court then turned to the vertical question: whether
    Congress could constitutionally impose RFRA on the states under
    its authority to remedy violations of the Fourteenth Amendment.
    This question, too, it answered in the negative.                   The Court held
    that Congress may sometimes enact legislation to prevent future
    harms, but only when there is "a congruence between the means used
    and the ends to be achieved.                The appropriateness of remedial
    measures must be considered in light of the evil presented."                     Id.
    at   530.      RFRA,   said    the    Court,      failed    that   congruence   and
    proportionality test, because it was "so out of proportion to a
    - 21 -
    supposed remedial or preventive object that it cannot be understood
    as   responsive     to,   or   designed     to    prevent,   unconstitutional
    behavior." Id. at 532. RFRA's "[s]weeping coverage" impermissibly
    "ensure[d] its intrusion at every level of government, displacing
    laws and prohibiting official actions of almost every description
    and regardless of subject matter."               Id.    Congress imposed that
    sweeping coverage on states despite no examples in the legislative
    record of state laws of general applicability "passed because of
    religious bigotry."        Id. at 530.        The Court thus held that the
    "considerable congressional intrusion into the States' traditional
    prerogatives and general authority to regulate for the health and
    welfare of their citizens," id. at 534, fell outside Congress's
    limited legislative authority and upset the "federal balance," id.
    at 536.    This holding, however, was limited to the states as RFRA
    continues to govern the federal government.              See Burwell v. Hobby
    Lobby Stores, Inc., 
    573 U.S. 682
    , 695 (2014); Gonzales v. O Centro
    Espirita Beneficente Uniao do Vegetal, 
    546 U.S. 418
    , 424 n.1
    (2006).
    Our discussion and analysis of City of Boerne clearly
    suggests      why   Congress's     enactment     of    § 249(a)(1)   under   the
    Thirteenth Amendment was nothing like its enactment of RFRA under
    the Fourteenth Amendment.          First, we note that nowhere does City
    of   Boerne    mention    either    Jones   or   the    Thirteenth   Amendment.
    Rather, the cases concern two different amendments, each with its
    - 22 -
    own unique history, structure, and caselaw.                 Diggins furnishes no
    reason    to    believe   that    City     of    Boerne's   examination     of    the
    Fourteenth       Amendment's     Enforcement       Clause      displaces    Jones's
    separate analysis of the of the Thirteenth Amendment.                      In fact,
    the Court in Jones and City of Boerne conducted similar inquiries
    into each amendment, employing parallel methodologies and modes of
    reasoning.       Compare, e.g., Jones, 
    392 U.S. at 437-43
     (reviewing
    the   ratification        history     of    the    Thirteenth       Amendment     and
    concurrent congressional debates concerning the 1866 Civil Rights
    Act), with City of Boerne, 
    521 U.S. at 517-27
     (examining the
    history of the Fourteenth Amendment). The fact that the two cases'
    shared reasoning may have led to different conclusions reflects
    that the underlying amendments, and therefore their applications,
    may vary correspondingly.
    Nor was Jones's rational-determination standard -- which
    Diggins        contends     "strips        all     checks      on     Congress'[s]
    power" -- undermined by City of Boerne.                This distinction, too, is
    driven by the varied histories of the Thirteenth and Fourteenth
    Amendments.       The Fourteenth Amendment permits Congress to enforce
    only those rights discussed in that amendment, see U.S. Const.
    amend.    XIV,     § 5,   and    "there     is     a   long,    well-established,
    doctrinally rich, and highly sophisticated tradition of judicial
    interpretation      of    the    substantive      protections       established    by
    Section One of the Fourteenth Amendment," Nelson, 
    277 F.3d at
    185
    - 23 -
    n.20.      Yet the same does not hold true for Section One of the
    Thirteenth Amendment, the meaning of which "has almost never been
    addressed directly by the courts, in the absence of specific
    congressional legislation enacted."              
    Id.
         Read together, then,
    City of Boerne and Jones do not expose a tension in the caselaw,
    but   rather      reveal   a   key    structural,   textual,     and    historical
    dissimilarity between the Reconstruction Amendments.13
    Comparing § 249(a)(1) with RFRA reveals other crucial
    dissimilarities.         Most importantly, unlike RFRA, § 249(a)(1) does
    not     involve     congressional       interpretation    of     the     scope   of
    substantive rights protected by the Constitution.                      The Supreme
    Court, not Congress, determined that the Thirteenth Amendment bans
    not just slavery but "substitutes for the slave system."                         See
    Jones,     
    392 U.S. at 442
    .     The   Supreme   Court,   not     Congress,
    13Indeed, it has been long recognized -- in caselaw relied
    on in both City of Boerne and Jones -- that the enforcement clauses
    of the Thirteenth and Fourteenth Amendments differ at least insofar
    as the latter imposes a state-action requirement absent in the
    former. Compare The Civil Rights Cases, 
    109 U.S. at 20
     (noting
    that § 2 of the Thirteenth Amendment empowers "Congress to adopt
    direct   and    primary,   as   distinguished    from   corrective,
    legislation"); with id. at 19 (Congress had exceeded its
    legislative authority under the Fourteenth Amendment in enacting
    the Civil Rights Act of 1875 because the latter was "not corrective
    legislation" but rather "primary and direct" in character); see
    also City of Boerne, 
    521 U.S. at 525
     (noting that the Fourteenth
    Amendment's Enforcement Clause "did not authorize Congress to pass
    'general legislation upon the rights of the citizen, but corrective
    legislation . . . for counteracting such laws as the States may
    adopt or enforce'" (quoting The Civil Rights Cases, 
    109 U.S. at 13-14
    )).
    - 24 -
    determined that review of Congressional determinations of what
    constitute the "badges and incidents of slavery" are reviewed under
    the rational-determination standard.                 Id. at 440.      The Supreme
    Court,    not     Congress,       determined     that     Congress      rationally
    determined that racially motivated violence is a relic of slavery,
    and   thus     its    prohibition     fell     within    Congress's     Thirteenth
    Amendment enforcement power to obliterate the relics of slavery.
    See Griffin, 
    403 U.S. at 105
    .                Thus, in enacting § 249(a)(1),
    Congress did not usurp the judiciary's role in interpreting the
    Constitution and in defining the balance of power between the
    federal government and the state governments.                   Congress enacted
    § 249(a)(1) within the scheme announced by the Supreme Court, and
    did not purport to pronounce the scheme the Supreme Court ought to
    apply.   Additionally, unlike RFRA, § 249(a)(1) does not operate on
    state governments.           The statute does not diminish the states'
    police power in any way.
    Moreover, even if we were to accept Diggins's invitation
    to    apply    City    of    Boerne   here,     § 249(a)(1)     would    still   be
    constitutional.          Unlike     with     RFRA,   Congress    made   extensive
    findings about the need for federal assistance to combat the
    pervasive     problem       of   racially    motivated    violence.       Congress
    enacted § 249(a)(1) as part of the Shepard-Byrd Act to address
    racially motivated violence as a badge or incidence of slavery.
    The scope and gravity of that harm, Congress determined,                         is
    - 25 -
    considerable   and   widespread.      In   passing   the    law,    Congress
    expressly found that "[t]he incidence of violence motivated by the
    actual or perceived race[] [or] color[] . . . of the victim poses
    a serious national problem."       Pub. L. 111-84 § 4702(1), 123 Stat.
    at 2835 (codified at 
    34 U.S.C. § 12361
    (1)).      It further explained:
    For generations, the institutions of slavery
    and involuntary servitude were defined by the
    race, color, and ancestry of those held in
    bondage.   Slavery and involuntary servitude
    were enforced, both prior to and after the
    adoption of the 13th amendment to the
    Constitution of the United States, through
    widespread   public  and   private   violence
    directed at persons because of their race,
    color, or ancestry, or perceived race, color,
    or ancestry.
    Pub. L. 111-84 § 4702(7), 123 Stat. at 2836 (codified at 
    34 U.S.C. § 12361
    (2)).   Congress thus concluded that "eliminating racially
    motivated violence is an important means of eliminating, to the
    extent possible, the badges, incidents, and relics of slavery and
    involuntary servitude."      
    Id.
          To support those findings and
    conclusions,   Congress   made   extensive   findings      on   a   pervasive
    national pattern of racially motivated hate crimes.14           The Supreme
    14 See H.R. Rep. 111-86 at 5 (2009) (reporting that "[s]ince
    1991, the FBI has identified over 118,000 reported violent hate
    crimes," of which, for the most recent year, "[r]acially-motivated
    bias accounted for approximately half (50.8%) of all incidents");
    
    id. at 6-9
     (describing the inadequacies of prior federal statues);
    
    id. at 7
     (articulating state and local needs for "the Federal
    Government's resources, forensic expertise, and experience in the
    identification and proof of bias-motivated violence and criminal
    networks").
    - 26 -
    Court     has     similarly      recognized     the       unique   harms   of    racially
    motivated acts of violence, see Wisconsin v. Mitchell, 
    508 U.S. 476
    , 488 (1993), reinforcing Congress's finding.
    Further, unlike RFRA, § 249(a)(1) does not prohibit
    facially constitutional conduct.                   See United States v. Georgia,
    
    546 U.S. 151
    , 158–59 (2006).                Section 249(a)(1) prohibits persons
    from actually violating the Thirteenth Amendment by perpetuating
    a    badge   or       incident    of   slavery,      to    wit,    racially     motivated
    violence.         As we have explained, Congress targeted a narrow
    category of conduct.               It sought to "obliterate," Civil Rights
    Cases, 
    109 U.S. at 21
    , violence designed to communicate and enforce
    ideas of racial superiority and inferiority, see Hatch, 722 F.3d
    at 1206.     It does not target "facially constitutional conduct[] in
    order to prevent and deter unconstitutional conduct."                         Nev. Dept.
    Hum. Res. v. Hibbs, 
    538 U.S. 721
    , 727-28 (2003).
    And     unlike     RFRA,      § 249(a)(1)          is   congruent     and
    proportional to the harm Congress sought to address.                          The remedy
    Congress chose is narrow.                   To address the long and pervasive
    history      of    violence       targeted    at     racial    minorities,      Congress
    crafted a narrow criminal prohibition, which addresses only actual
    acts of willful racially motivated violence.                       Prosecutions may be
    brought federally only in limited circumstances, each of which
    Congress connected to an important federal interest or to the lack
    of    a   state       interest.        
    18 U.S.C. § 249
    (b)(1).         Given    those
    - 27 -
    circumstances, § 249(a)(1) "cannot be said to be                         'so out of
    proportion to a supposed remedial or preventive object that it
    cannot be understood as responsive to, or designed to prevent,
    unconstitutional behavior.'"              Tennessee v. Lane, 
    541 U.S. 509
    , 533
    (2004) (quoting City of Boerne, 
    521 U.S. at 532
    ).
    Diggins also relies on Shelby County as another case
    supposedly undermining Jones, but that case offers him even less
    support   than     City    of    Boerne.       In    Shelby    County,       the   county
    challenged the constitutionality of §§ 4(b) and 5 of the Voting
    Rights Act of 1965, 
    52 U.S.C. §§ 10303
    (b), 10304, which Congress
    enacted    using    authority          under   the    Fourteenth       and    Fifteenth
    Amendments.        Those provisions prohibited jurisdictions with a
    history    of    racially       discriminatory        voting    restrictions            from
    changing any of their voting rules without prior approval of the
    Department of Justice.            See 
    52 U.S.C. § 10304
    .          The Court agreed
    with Shelby County, enjoining enforcement of those provisions of
    the Voting Rights Act.            The Court held that "[t]he Voting Rights
    Act    sharply   departs        from    [several]     basic    principles"         of    the
    American constitutional order: that the federal government may not
    veto    state    laws,     that        "[s]tates     retain    broad     autonomy        in
    structuring        their        governments         and   pursuing        legislative
    objectives," and that states enjoy "equal sovereignty" and must be
    treated alike.       Shelby Cnty., 570 U.S. at 542-544.                  While those
    extraordinary measures had once been justified, the Court held
    - 28 -
    that they were no longer constitutionally sanctioned.    Id. at 545-
    47.    Instead, pointing to improvements in racial disparities in
    voter turnout since 1965, the Court held that "Congress –– if it
    is to divide the States -- must identify those jurisdictions to be
    singled out on a basis that makes sense in light of current
    conditions.   It cannot rely simply on the past."    See id. at 553.
    This, the Court determined, Congress failed to do.       See id. at
    554.
    We reiterate that, like City of Boerne, Shelby County
    neither expressly nor impliedly overrules Jones. The Supreme Court
    did not pronounce on how or whether this standard might apply to
    different exercises of legislative authority under the Fourteenth
    and Fifteenth Amendments, much less announce a test applicable to
    the Thirteenth Amendment's Enforcement Clause.      Further, even if
    Shelby County can be read to impose a general obligation on
    Congress to update civil rights laws to account for current
    conditions, we see no issue with § 249(a)(1).       Congress adopted
    the law after looking at conditions in 2009, which it found were
    broadly consistent with historical data.    H.R. Rep. 111-86 at 5
    (2009). Although Diggins insinuates that hate crimes are no longer
    matters of national significance, he has given us absolutely no
    reason to think that conditions have shifted enough to deprive
    Congress of the ability to legislate against racially motivated
    violence. To the contrary, in May 2021, Congress found a "dramatic
    - 29 -
    increase in hate crimes and violence against Asian-Americans and
    Pacific Islanders," and allocated additional resources to federal
    programs combatting hate crimes.       See COVID-19 Hate Crimes Act,
    Pub. L. 117-13, 
    135 Stat. 265
    .
    Diggins   contends   that     § 249(a)(1)   displaces   state
    authority, implicating the same federalism concerns as §§ 4 and 5
    of the Voting Rights Act.   Not so.    Unlike the provisions at issue
    in Shelby County, § 249(a)(1) does not represent an "extraordinary
    departure from the traditional course of relations between the
    States and the Federal Government."      Shelby Cnty., 570 U.S. at 557
    (quoting Presley v. Etowah Cnty. Comm'n, 
    502 U.S. 491
    , 500–01
    (1992)).   Rather, § 249(a)(1) is a cornerstone of a scheme of
    cooperative federalism, representing an ordinary example of one of
    many parallel state and federal penal laws.       See Gamble v. United
    States, 
    139 S. Ct. 1960
    , 1965-67 (2019). Indeed, Congress asserted
    federal jurisdiction to allow the Department of Justice to "work
    together as partners" with state and local law enforcement.          
    34 U.S.C. § 30501
    (9).    Section 249(a)(1) does not allow the federal
    government to veto state laws or restructure state governance; it
    says nothing on the subject.     Nor does § 249(a)(1) discriminate
    between states; it applies uniformly nationwide.
    Aware of federalism concerns, see H.R. Rep. 111-86 at
    14-15, Congress limited federal prosecutions under § 249(b)(1) to
    - 30 -
    four scenarios, when the Attorney General (or a designee) certifies
    that:
    (A) the State does not have jurisdiction;
    (B) the State has requested that      the
    Federal Government assume jurisdiction;
    (C) the verdict or sentence obtained
    pursuant to State charges left demonstratively
    unvindicated    the   Federal    interest   in
    eradicating bias-motivated violence; or
    (D) a prosecution by the United States is
    in the public interest and necessary to secure
    substantial justice.
    
    18 U.S.C. § 249
    (b)(1).      The first and   second grounds   cannot
    possibly encroach on state authority.       When the state    lacks
    jurisdiction, there is no state authority to usurp.    And when the
    state asks for a federal prosecution, its consent alleviates any
    federalism concerns. The third ground, in turn, allows for federal
    jurisdiction only when a state has acted and a federal interest
    remains.   The federal government does not diminish state authority
    when it undertakes a second prosecution after the state has already
    taken its case to trial.       Finally, the fourth ground, while
    allowing for a more robust assertion of federal interests, still
    allows the state to undertake any prosecution it wishes to.    See
    Gamble, 
    139 S. Ct. at 1965-67
    .   In sum, none of the cases in which
    Congress authorized prosecutions under § 249(a)(1) weaken state
    authority in any way.   Nor can Congress be said to have arrogated
    to itself a general police power, see Hatch, 722 F.3d at 1203-04,
    - 31 -
    when    it   targets     only    racially      motivated    violence   through
    cooperation with the states.
    The cooperative nature of the federalism here is further
    evidenced by the statutory context.            Congress enacted § 249(a)(1)
    as   part    of   the   Shepard-Byrd    Act.      Far   from   usurping   state
    authority, the act enhances state power.                    It authorizes the
    Attorney General to "provide technical, forensic, prosecutorial,
    or any other form of assistance in the criminal investigation or
    prosecution of" violent hate crimes under state law.              Pub. L. 111-
    84 § 4704(a)(1), 123 Stat. at 2837 (codified at 
    34 U.S.C. § 30503
    (a)(1)).       It similarly authorizes the Attorney General to
    award grants to state and local law enforcement agencies "for
    extraordinary      expenses     associated     with   the   investigation   and
    prosecution of hate crimes."           Pub. L. 111-84 §§ 4704(b)(1), 4705
    123 Stat. at 2837 (codified at 
    34 U.S.C. §§ 30503
    (b)(1), 30504).15
    That is why twenty-eight state attorneys general lobbied Congress
    to enact the law, expressing a belief that "federal assistance is
    critical in fighting the invidious effects of hate crimes."               Local
    Law Enforcement Hate Crimes Prevention Act of 2007: Hearing on
    H.R. 1589 Before the Subcomm. on Crime, Terrorism & Homeland Sec.,
    Amendments to the Shepard-Byrd Act, enacted in May 2021,
    15
    provide for even more resources to help states investigate and
    prosecute hate crimes. Khalid Jabara and Heather Heyer National
    Opposition to Hate, Assault, and Threats to Equality Act of 2021,
    Pub. L. 117-13 § 5, 
    135 Stat. 265
    , 266-72 (codified at 
    34 U.S.C. § 30507
    ).
    - 32 -
    H. Comm. on the Judiciary 18 (2007) (letter from twenty-seven state
    attorneys general); accord 
    id. at 23
     (letter from Florida attorney
    general).
    *       *        *
    Contrary     to    Diggins's       arguments,      then,   the   Court's
    decisions in City of Boerne and Shelby County neither undermine
    Jones nor indicate that § 249(a)(1) poses federalism concerns.
    The mere fact that the Reconstruction Amendments possess similarly
    worded enforcement clauses and "disclose[] a unity of purpose" at
    a broad level, see The Slaughter–House Cases, 
    83 U.S. 36
    , 67
    (1872), does not obviate the obvious.                  The Thirteenth, Fourteenth,
    and   Fifteenth        Amendments        are       independent      and      distinct
    constitutional provisions, each with its unique scope, enforcement
    clause, and ratification history, and each spawning its own unique
    jurisprudence.         Accordingly, we cannot simply graft doctrines
    articulated     and    crafted    for    entirely        separate   constitutional
    provisions      onto   the    Thirteenth       Amendment      context.        Section
    249(a)(1) is an attempt to supplement state efforts to address the
    continuing problem of racially motivated violence.                      It supports
    rather   than    offends      principles      of   federalism.         Wherever   the
    boundary on Congress's enforcement power under the Thirteenth
    Amendment lies, § 249(a)(1) easily falls within it.
    - 33 -
    II. Certification under § 249(b)(1)
    Diggins next alleges deficiencies in the government's
    certification     of    the     prosecution      pursuant    to    
    18 U.S.C. § 249
    (b)(1).     As described supra Section I.D, prosecutions of
    offenses under § 249(a) require the "certification in writing of
    the Attorney General[] or a designee" that one of four conditions
    exist warranting federal intervention.              
    18 U.S.C. § 249
    (b)(1).
    Pursuant to this provision, the Assistant Attorney General, acting
    as the Attorney General's designee, certified shortly before the
    grand   jury    returned      the   superseding      indictment     that      the
    prosecution of Diggins and his nephew under § 249(a)(1) was "in
    the public interest and necessary to secure substantial justice,"
    one of the four situations contemplated by § 249(b)(1).                  See id.
    § 249(b)(1)(D).
    Diggins     argues    that    this    statement   was   deficient,
    suggesting that the Assistant Attorney General's certification
    must also explain why he made his decision. But Diggins explicitly
    disclaims arguing that the certification is judicially reviewable,
    contending      that    although        "[t]he    certification         can   be
    reviewed, . . . the reviewers are not courts," but rather "the
    voters."     Given this concession, it is unclear what remains of
    Diggins's contention.      Assuming he has not waived his challenge to
    the certification, he points to no basis in the Constitution or
    the statute for imposing an additional procedural hurdle on the
    - 34 -
    Attorney General's exercise of prosecutorial discretion.             We find
    none, either.   Rather, it is well established that the decision to
    prosecute is vested exclusively in the executive branch and is
    generally not subject to judicial review.             See United States v.
    Santos-Soto,    
    799 F.3d 49
    ,   62   (1st   Cir.   2015)    (noting   that
    indictment decisions are "a matter within the sole discretion of
    the prosecution").
    While we have not previously ruled on the reviewability
    of certifications under § 249(b), along with all but one of our
    sister circuits we have held unreviewable a similar certification
    requirement in federal juvenile law, codified at 
    18 U.S.C. § 5032
    ,
    which in relevant part requires the Attorney General to confirm
    that "there is a substantial Federal interest in the case." United
    States v. Smith, 
    178 F.3d 22
    , 25 (1st Cir. 1999); accord United
    States v. F.S.J., 
    265 F.3d 764
    , 768 (9th Cir. 2001); United States
    v. Doe, 
    226 F.3d 672
    , 676–78 (6th Cir. 2000); United States v.
    Jarrett, 
    133 F.3d 519
    , 538–41 (7th Cir. 1998); United States v.
    Juv. Male, J.A.J., 
    134 F.3d 905
    , 906–09 (8th Cir. 1998); In re
    Sealed Case, 
    131 F.3d 208
    , 212–15 (D.C. Cir. 1997); United States
    v. Juv. No. 1, 
    118 F.3d 298
    , 303–07 (5th Cir. 1997); Impounded
    (Juv. R.G.), 
    117 F.3d 730
    , 733–36 (3d Cir. 1997); United States v.
    I.D.P., 
    102 F.3d 507
    , 510–13 (11th Cir. 1996).16              Our holding in
    16The Fourth Circuit is unique among appellate courts to hold
    that certifications of a substantial federal interest under § 5032
    - 35 -
    Smith that certification under § 5032 is an unreviewable exercise
    of prosecutorial discretion was based largely on the fact that the
    provision "does not specifically provide for judicial review of a
    certification      and     fails   to     articulate     any   standards    for
    determining the existence of a substantial federal interest."
    17 Smith, 178
     F.3d at 25.
    For the same reason, we now hold that certifications
    made under      § 249(b)    are exempt from judicial review, as the
    government urges us to determine.                See also United States v.
    Bowers,   
    495 F. Supp. 3d 362
    ,    374   (W.D.   Pa.   2020)   (finding
    certifications under        § 249(b) unreviewable);        United States     v.
    Jenkins, 
    909 F. Supp. 2d 758
    , 774 (E.D. Ky. 2012) (same).                  Like
    § 5032, § 249(b) neither expressly provides for judicial review
    nor specifies any standards to evaluate the nature of the federal
    are subject to judicial review. See United States v. Juv. Male
    No. 1, 
    86 F.3d 1314
    , 1317–21 (4th Cir. 1996). In Roof, the Fourth
    Circuit "assume[d] without deciding" that § 249 certifications are
    reviewable, but affirmed the certification on the merits and noted
    that its "scope of review [wa]s limited because the Attorney
    General's certifications must be afforded substantial deference."
    10 F.4th at 396-97.
    17Analogously, we have held in the context of capital cases
    that "because the exercise of prosecutorial discretion is a 'core
    executive constitutional function,'" the guidelines contained in
    the United States Attorneys' Manual for determining whether to
    seek the death penalty do not confer substantive rights on
    defendants. See United States v. Lopez-Matias, 
    522 F.3d 150
    , 156
    (1st Cir. 2008) (quoting United States v. Armstrong, 
    517 U.S. 456
    ,
    465 (1996)); see also 
    id.
     (noting that "[w]e are reluctant to
    interfere with internal prosecutorial measures" in large part out
    of "a respect for the separation of powers").
    - 36 -
    interest at stake.   As such, certifications under § 249(b) are
    "unreviewable act[s] of prosecutorial discretion."      Smith, 
    178 F.3d at 26
    .18   Diggins's challenge to the certification of his
    prosecution thus fails.19
    18Diggins attempts to distinguish Smith by asserting that the
    certification here was "constitutionally defective" rather than a
    simple exercise of prosecutorial discretion, but this argument
    merely adverts to the same putative concerns about federalism and
    the scope of the Thirteenth Amendment that we have already rejected
    supra Part I.      Cf. Hatch, 722 F.3d at 1207 ("We see no
    constitutional significance in the certification requirement.").
    19By way of a letter submitted pursuant to Fed. R. Civ. P.
    28(j), Diggins also belatedly suggests that the certification
    requirement somehow represents an unconstitutional delegation of
    legislative power, citing as persuasive authority the Fifth
    Circuit's recent decision in Jarkesy v. SEC, 
    2022 WL 1563613
     (5th
    Cir. May 18, 2022).    In that case, a divided panel applied the
    nondelegation doctrine to strike down a provision of the Dodd-
    Frank Wall Street Reform and Consumer Protection Act, Pub. L. No.
    111-203, § 929P(a), 
    124 Stat. 1376
     (2010) (codified at 15 U.S.C.
    § 78u-2(a)) giving the SEC the authority to choose whether to bring
    certain enforcement actions in Article III courts or in
    administrative proceedings. See Jarkesy, 
    2022 WL 1563613
    , at *8-
    11.
    This contention fails on multiple grounds.      First, because
    Diggins did not raise any such argument in his opening brief, it
    is waived.   See Young v. Wells Fargo Bank, N.A., 
    717 F.3d 224
    ,
    239-40 (1st Cir. 2013) ("[A]rguments not raised in an opening brief
    are waived."). Second, Jarkesy is wholly inapposite. Exercises
    of prosecutorial discretion are emphatically not administrative
    delegations, but are -- as noted above -- quintessentially
    executive decisions. See Santos-Soto, 
    799 F.3d 49
     at 62; see also
    Jarkesy, 
    2022 WL 1563613
    , at *10 (holding that the decision whether
    to "assign certain actions to agency adjudication" is a legislative
    power, but the mere "deci[sion] whether to bring enforcement
    actions in the first place" is indeed "an executive, not
    legislative power"). As such, there is no possible nondelegation
    issue here. And third, even if nondelegation concerns were somehow
    applicable, the direction that prosecutions under § 249(b)(1)(D)
    be "in the public interest and necessary to secure substantial
    justice" indisputably satisfies the lax "intelligible principle"
    - 37 -
    III. The District Court's Evidentiary Rulings
    Diggins     lastly   attempts     to    challenge     the   district
    court's evidentiary rulings concerning the admission into evidence
    of his white-supremacist tattoos and expert testimony relating to
    the same.    But Diggins fails to develop this argument in his brief,
    mentioning    it   only   in   his   statement      of   the   issues   and   then
    (obliquely) in his summary of the argument and articulation of the
    standard of review.       He does not again discuss the matter in his
    argument.    This perfunctory treatment is insufficient.                 We have
    repeatedly made clear that a party waives an argument when it
    "neither develops the argument nor accompanies it with even a shred
    of authority."      United States v. González, 
    981 F.3d 11
    , 23 (1st
    Cir. 2020), cert. denied, 
    141 S. Ct. 1710
     (2021).                   "It is not
    enough merely to mention a possible argument in the most skeletal
    way, leaving the court to do counsel's work . . . ." United States
    v. Zannino, 
    895 F.2d 1
    , 17 (1st Cir. 1985).               Rather, "a litigant
    has   an   obligation     to   spell   out    its   arguments     squarely    and
    distinctly, or else forever hold its peace."              
    Id.
     (quoting Rivera–
    Gómez v. de Castro, 
    843 F.2d 631
    , 635 (1st Cir. 1988)) (internal
    quotation marks omitted).        Because Diggins's opening brief did not
    standard under our precedents and those of the Supreme Court. See
    United States v. Parks, 
    698 F.3d 1
    , 7 (1st Cir. 2012) (quoting
    J.W. Hampton, Jr., & Co. v. United States, 
    276 U.S. 394
    , 409
    (1928)); see also id. at 8 (noting that "modern case law tends
    regularly to disfavor" nondelegation arguments).
    - 38 -
    develop   his   contention   that   the   district   court   abused   its
    discretion in its evidentiary rulings, he has waived the argument.
    CONCLUSION
    The judgment below is affirmed.
    - 39 -