Ahmed Ali Muthana v. Michael Pompeo ( 2021 )


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  •  United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued May 15, 2020                 Decided January 19, 2021
    No. 19-5362
    AHMED ALI MUTHANA, INDIVIDUALLY, AND AS NEXT FRIEND
    OF HODA MUTHANA AND MINOR JOHN DOE,
    APPELLANT
    v.
    MICHAEL R. POMPEO, IN HIS OFFICIAL CAPACITY AS
    SECRETARY OF THE DEPARTMENT OF STATE, ET AL.,
    APPELLEES
    Appeal from the United States District Court
    for the District of Columbia
    (No. 1:19-cv-00445)
    Christina A. Jump argued the cause for appellant. With her
    on the briefs was Charles D. Swift.
    Scott G. Stewart, Deputy Assistant Attorney General, U.S.
    Department of Justice, argued the cause for appellees. With
    him on the brief were Joseph H. Hunt, Assistant Attorney
    General, William C. Peachey, Director, Office of Immigration
    Litigation, Anthony D. Bianco, Senior Litigation Counsel,
    Christopher A. Bates, Senior Counsel, and Joseph F. Carilli
    Jr., Trial Attorney.
    2
    John C. Eastman and Anthony T. Caso were on the brief
    for amicus curiae Center for Constitutional Jurisprudence in
    support of appellees.
    Before: TATEL and RAO, Circuit Judges, and SENTELLE ,
    Senior Circuit Judge.
    Opinion for the Court filed by Circuit Judge RAO.
    Opinion concurring in the judgment filed by Circuit
    Judge TATEL.
    RAO, Circuit Judge: Hoda Muthana grew up in the United
    States, but at age twenty left college to join the Islamic State of
    Iraq and Syria (“ISIS”). After marriage to two different ISIS
    fighters, Hoda now seeks to return to the United States with her
    son, John Doe. The State Department maintains that Hoda is
    not a citizen and has no right to return to the United States.
    Hoda’s father, Ahmed Ali Muthana (“Muthana”), initiated this
    lawsuit on behalf of his daughter and grandson to settle their
    citizenship. The district court held that Hoda and her son are
    not U.S. citizens, because Hoda’s father possessed diplomatic
    immunity when she was born in the United States, rendering
    her ineligible for citizenship by birth under the Fourteenth
    Amendment and her son ineligible for citizenship under
    
    8 U.S.C. § 1401
    (g). We affirm the district court. A child born
    in the United States to a foreign diplomat is not born “subject
    to the jurisdiction” of the United States and thus not entitled to
    citizenship by birth under the Fourteenth Amendment. Hoda
    Muthana is not now and never was a citizen of the United
    States because her father enjoyed diplomatic immunity
    pursuant to the Vienna Convention on Diplomatic Relations
    when she was born, and she was never naturalized. Because
    Hoda is not a citizen, neither is her son, who was born abroad
    to two alien parents.
    3
    Muthana also sought mandamus relief to compel the
    United States to assist in bringing Hoda and John Doe back to
    the United States; however, we have no jurisdiction over such
    a claim and it must be dismissed. Finally, Muthana sought a
    declaratory judgment that if he sent money and supplies to his
    daughter and grandson, he would not violate the prohibition on
    providing material support for terrorism, 18 U.S.C. § 2339B.
    We agree with the district court that Muthana did not establish
    standing because he failed to allege a personal injury to his
    constitutional rights.
    I.
    Ahmed Ali Muthana served as the First Secretary of the
    Permanent Mission of Yemen to the United Nations. During
    this posting he lived in New Jersey with his wife and children.
    The United Nations notified the State Department of
    Muthana’s appointment in October 1990, thus entitling him to
    diplomatic-level immunity pursuant to the U.N.
    Headquarters Agreement and the Vienna Convention on
    Diplomatic        Relations,    Apr.     18,      1961,      23
    U.S.T. 3227 (the “Vienna Convention”).1 After several years,
    Yemen terminated Muthana from his diplomatic post and
    required him to surrender his diplomatic credentials no later
    than September 1, 1994. In October 1994,2 Hoda Muthana was
    1
    The United States accords diplomats stationed at U.N. missions the
    same privileges and immunities as diplomats stationed at embassies
    and consulates. See Agreement Between the U.S. and U.N.
    Respecting the Headquarters of the U.N., June 26, 1947, 
    61 Stat. 3416
    ; Convention on Privileges and Immunities of the U.N., Feb. 13,
    1946, 21 U.S.T. 1418. The State Department certified that Muthana
    possessed “diplomatic agent level immunity.” J.A. 18.
    2
    As the precise date of Hoda’s birth is immaterial to the legal
    questions, we omit it here in order to protect her privacy.
    4
    born in New Jersey to Muthana and his wife, neither of whom
    was an American citizen at the time. On February 6, 1995, the
    United Nations notified the State Department that Yemen had
    terminated Muthana from his diplomatic post. Muthana and his
    wife, as well as Hoda’s older siblings, eventually became
    naturalized citizens. Hoda, however, was never naturalized as
    a U.S. citizen. Muthana applied for a U.S. passport on behalf
    of Hoda, which the State Department issued in 2005 and then
    renewed in 2014.
    Later in 2014, Hoda dropped out of college, traveled to
    Syria, and joined ISIS. Hoda became a prominent
    spokeswoman for ISIS on social media, advocating the killing
    of Americans and encouraging American women to join ISIS.
    She also married two ISIS fighters in succession and had a
    child, John Doe, by way of her second husband, who was an
    ISIS fighter from Tunisia. In 2016, the State Department
    revoked Hoda’s passport after determining that it had been
    issued in error because Hoda was not a U.S. citizen by birth
    and had never been naturalized. In a letter sent to Hoda’s last
    known address, the State Department informed her of the
    passport revocation and explained that the passport had been
    issued based on an error of fact—the government’s mistaken
    belief that at the time of Hoda’s birth, Muthana no longer
    possessed diplomatic immunity. In fact, Muthana retained his
    diplomatic immunity until at least February 6, 1995, months
    after Hoda’s birth. As the State Department explained, a child
    born to a diplomat is not “subject to the jurisdiction” of the
    United States, and therefore does not have citizenship by birth.
    U.S. CONST. amend. XIV, § 1. Muthana received the letter and
    sent a response asserting his daughter is a U.S. citizen by birth.
    In 2018, as the ostensible Caliphate crumbled, Hoda and her
    son fled and allegedly remain in a camp in Syria run by Kurdish
    forces.
    5
    After receiving communications from his daughter,
    Muthana contacted the U.S. Attorney for the Northern District
    of Alabama, where he resided, and expressed Hoda’s “desire
    to return as well as her willingness to surrender to United States
    authorities for any contemplated charges.” The U.S. Attorney
    responded by referring the matter to the State Department.
    About a month later, Secretary of State Mike Pompeo issued a
    public “Statement on Hoda Muthana” declaring that “Ms.
    Hoda Muthana is not a U.S. citizen and will not be admitted
    into the United States. She does not have any legal basis, no
    valid U.S. passport, no right to a passport, nor any visa to travel
    to the United States.” This statement was recognized by
    President Donald Trump, who tweeted: “I have instructed
    Secretary of State Mike Pompeo, and he fully agrees, not to
    allow Hoda Muthana back into the Country!”
    The next day, Muthana filed a nine count complaint in the
    U.S. District Court for the District of Columbia, alleging these
    statements effectively revoked his daughter’s and grandson’s
    U.S. citizenship in violation of the Fourteenth Amendment.
    First, proceeding as next friend to his daughter and grandson,
    Muthana sought a declaratory judgment “recognizing the
    citizenship of his daughter and grandson.” Second, again
    proceeding as next friend, Muthana sought “injunctive and
    mandamus relief obligating the United States to accept Ms.
    Muthana and her son back into the United States and to use all
    available means to do so.” Third, Muthana sought a declaratory
    judgment that he would not violate the prohibition on
    providing material support for terrorism, 18 U.S.C. § 2339B, if
    he sent money and supplies to his daughter and grandson in
    Syria. The government moved to dismiss for lack of subject
    matter jurisdiction and failure to state a claim, or, in the
    alternative, for summary judgment. In support of its motion,
    the government attached a certification from the State
    Department that Muthana and his family possessed diplomatic
    6
    immunity until February 6, 1995, well after Hoda’s birth in
    October 1994.
    The district court granted summary judgment to the
    government on the citizenship and reentry claims and
    dismissed the material support claim for lack of subject matter
    jurisdiction. The court first found Muthana could proceed as
    “next friend” to his daughter and grandson because he had a
    “significant relationship” to them and they were unavailable
    due to their presence in Syria. Turning to the merits, the district
    court converted the government’s Federal Rule of Civil
    Procedure 12(b)(6) motion for failure to state a claim into a
    Rule 56 motion for summary judgment. The court held that
    Muthana’s citizenship and reentry claims all failed for the same
    fundamental reason: Hoda is not, and never has been, a U.S.
    citizen. The court determined that the State Department
    reasonably interpreted the Vienna Convention to provide for
    diplomatic immunity until the sending state notifies the
    receiving state of the diplomat’s termination. The court next
    found that the State Department’s certification was conclusive
    proof that Muthana continued to enjoy diplomatic immunity on
    the date his daughter was born. Because the child of a diplomat
    is not born “subject to the jurisdiction” of the United States, the
    court held that Hoda was not entitled to citizenship by birth
    and, since she was not subsequently naturalized, never became
    a U.S. citizen. Finally, the court dismissed for lack of
    jurisdiction Muthana’s request for a declaration that he would
    not violate the statutory prohibition on providing material
    support for terrorism by sending aid to his daughter and
    grandson. The court determined that Muthana failed to allege
    the statute violated his constitutional rights. Muthana timely
    appealed.
    7
    II.
    Although the government does not renew its challenge to
    standing on appeal, we have an independent obligation to
    ensure our jurisdiction. Grocery Mfrs. Ass’n v. EPA, 
    693 F.3d 169
    , 174 (D.C. Cir. 2012). There is a serious question of
    whether Muthana can sustain next friend standing on behalf of
    his adult daughter Hoda. Next friend standing is a narrow
    exception to Article III standing, which requires that a party
    assert his own rights in alleging an injury in fact. Next friend
    standing has been generally limited to three historically
    grounded exceptions codified by Congress: a person may assert
    next friend standing on behalf of minors and incompetents, or
    to seek a writ of habeas corpus. See Whitmore v. Arkansas, 
    495 U.S. 149
    , 163 n.4 & 164 (1990) (“Indeed, if there were no
    restriction on ‘next friend’ standing in federal courts, the
    litigant asserting only a generalized interest in constitutional
    governance could circumvent the jurisdictional limits of
    Art. III simply by assuming the mantle of ‘next friend.’”).
    Hoda does not fit within any of the established exceptions. At
    age twenty, she is not a minor, and Muthana has not asserted
    that she is incompetent. See FED. R. CIV. P. 17(c). Nor does
    Muthana petition for a writ of habeas corpus on Hoda’s behalf.
    We need not decide whether Muthana may proceed as
    next friend to Hoda, however, because Muthana may
    proceed as next friend to his grandson.3 Federal Rule of Civil
    3
    The district court held there was next friend standing for Hoda and
    John Doe by relying on Ali Jaber v. United States, which held that
    next friend standing may be invoked whenever a “plaintiff[] can
    sufficiently demonstrate its necessity,” and therefore that next friend
    standing does not require statutory authorization. 
    155 F. Supp. 3d 70
    ,
    76 (D.D.C. 2016). We are not aware of any Supreme Court or circuit
    precedent that extends next friend standing beyond the exceptions
    8
    Procedure 17 allows a next friend to sue on behalf of a minor.
    Next friend standing on behalf of minors is a long-recognized
    exception to the rule that a litigant can claim injury only to his
    personal interests. See Whitmore, 
    495 U.S. at
    163 n.4. This
    exception recognizes that a minor “must be represented by a
    competent adult” to pursue his claims in court. T.W. by Enk v.
    Brophy, 
    124 F.3d 893
    , 895 (7th Cir. 1997); see also Whitmore,
    
    495 U.S. at 165
     (explaining the “ancient tradition” of next
    friend standing requires that “the real party in interest is unable
    to litigate his own cause due to mental incapacity, lack of
    access to court, or other similar disability”). Muthana thus may
    proceed on behalf of his grandson if he qualifies as his next
    friend. He does.
    To determine whether a person may proceed as next friend
    to a minor, we examine the relationship between the proposed
    next friend and minor. See T.W. by Enk, 
    124 F.3d at 897
    ; cf.
    Whitmore, 
    495 U.S. at
    163–64 (explaining that, to obtain a writ
    of habeas corpus as a next friend, the next friend “must be truly
    dedicated to the best interests of the person on whose behalf he
    seeks to litigate” and suggesting that a significant relationship
    is required). Not every person who is interested in serving as a
    minor’s next friend qualifies for that role. There must
    ordinarily be a significant relationship between the proposed
    next friend and minor, see T.W. by Enk, 
    124 F.3d at 897
    , though
    codified by Congress. Ali Jaber misconstrues the Supreme Court’s
    decision in Whitmore, which identified serious Article III concerns
    with expanding next friend standing and simply reserved the
    question of whether next friend standing could be sustained absent
    statutory authorization. Whitmore, 
    495 U.S. at 164
    . Moreover, we
    note that a decision of our district court “do[es] not establish the law
    of the circuit, nor, indeed, do[es it] even establish the law of the
    district.” In re Executive Office of President, 
    215 F.3d 20
    , 24 (D.C.
    Cir. 2000) (cleaned up).
    9
    that requirement may not rigidly apply when a minor has no
    significant relationships, see Sam M. ex rel. Elliott v. Carcieri,
    
    608 F.3d 77
    , 91 (1st Cir. 2010).
    Muthana easily qualifies as next friend to his grandson. A
    minor’s parent or close relative is a natural fit to serve as his
    next friend in most cases. The government argued below that,
    as his mother, Hoda was the appropriate next friend for John
    Doe. But when a minor’s parent is “unable, unwilling or
    refuses to act” as next friend to the minor, another person may
    proceed as next friend. See Ad Hoc Comm. of Concerned
    Teachers v. Greenburgh No. 11 Union Free Sch. Dist., 
    873 F.2d 25
    , 30 (2d Cir. 1989). Hoda is unable to proceed as John
    Doe’s next friend because she is inaccessible in a Kurdish
    camp in Syria and unable to return to the United States.
    Muthana is a close relative of John Doe who is able and willing
    to litigate his claims. Because Muthana has a significant
    relationship to his grandson, he may proceed as John Doe’s
    next friend.
    Once a court determines that a party has standing to
    proceed as next friend, it must determine if the real party in
    interest possesses standing in his own right. Here, the alleged
    deprivation of American citizenship without due process of law
    is a judicially cognizable injury in fact. See U.S. CONST .
    amend. XIV, § 1; see also Kennedy v. Mendoza-Martinez, 
    372 U.S. 144
    , 159 (1963) (“Citizenship … is expressly guaranteed
    by the Fourteenth Amendment to the Constitution, which
    speaks in the most positive terms.”). Accepting Muthana’s
    allegations as true, the U.S. government denied John Doe his
    U.S. citizenship without due process. See Lujan v. Defs. of
    Wildlife, 
    504 U.S. 555
    , 561 (1992) (explaining that we take a
    plaintiff’s affidavits and other factual evidence as true when
    determining standing at the summary judgment stage). This
    injury is actual and personal to John Doe, fairly traceable to the
    10
    government’s conduct, and redressable through a declaratory
    judgment settling his citizenship. See 
    id.
     at 560–61. Because
    John Doe would have standing to bring his citizenship claim,
    Muthana can pursue this claim as his grandson’s next friend.
    The district court had jurisdiction to determine John Doe’s
    citizenship, a question that necessarily required a
    determination of his mother’s citizenship. Under the
    Immigration and Nationality Act, a person born outside the
    United States to one citizen-parent is a citizen as long as his
    citizen-parent lived in the United States for five years, and was
    at least fourteen years old for two of those years. 
    8 U.S.C. § 1401
    (g).4 The only alleged basis for John Doe’s citizenship
    is the citizenship of his mother. Therefore, it is impossible to
    disaggregate the question of John Doe’s citizenship from that
    of his mother’s. Although Muthana cannot proceed as next
    friend to Hoda, the district court was required to determine
    Hoda’s citizenship as a necessary incident of its jurisdiction to
    determine John Doe’s citizenship.
    We review de novo a district court’s grant of summary
    judgment and dismissal of a claim for lack of subject matter
    jurisdiction. Waggel v. George Washington Univ., 
    957 F.3d 4
       As relevant here, 
    8 U.S.C. § 1401
     provides:
    The following shall be nationals and citizens of the
    United States at birth: … (g) a person born outside
    the geographical limits of the United States and its
    outlying possessions of parents one of whom is an
    alien, and the other a citizen of the United States
    who, prior to the birth of such person, was
    physically present in the United States or its
    outlying possessions for a period or periods totaling
    not less than five years, at least two of which were
    after attaining the age of fourteen years[.]
    11
    1364, 1371 (D.C. Cir. 2020) (summary judgment); Ctr. for Law
    & Educ. v. Dep’t of Educ., 
    396 F.3d 1152
    , 1156 (D.C. Cir.
    2005) (lack of jurisdiction). Summary judgment should be
    granted if “there is no genuine dispute as to any material fact
    and the movant is entitled to judgment as a matter of law.” FED .
    R. CIV . P. 56(a).
    III.
    Although Muthana’s claims focus on the revocation of
    citizenship for Hoda and John Doe, this case requires us to first
    ascertain whether Hoda and John Doe were United States
    citizens. That question turns on whether Muthana possessed
    diplomatic immunity when Hoda was born. Under the
    Fourteenth Amendment, “[a]ll persons born or naturalized in
    the United States, and subject to the jurisdiction thereof, are
    citizens of the United States.” U.S. CONST. amend. XIV, § 1.
    A child born on U.S. soil to a foreign diplomat possessing
    diplomatic immunity is not eligible for citizenship by birth
    because she is not born “subject to the jurisdiction” of the
    United States. See United States v. Wong Kim Ark, 
    169 U.S. 649
    , 693 (1898); Nikoi v. Att’y Gen., 
    939 F.2d 1065
    , 1066
    (D.C. Cir. 1991) (“The jurisdiction clause was intended to
    exclude from its operation children of ministers of foreign
    States born within the United States.”) (cleaned up). We agree
    with the district court that because Muthana enjoyed
    diplomatic immunity at the time of Hoda’s birth, she did not
    become a citizen at birth and therefore John Doe did not
    acquire citizenship because he was born abroad to non-citizen
    parents.
    The argument proceeds as follows. First, under the Vienna
    Convention, diplomatic immunity continues until notification
    of a diplomat’s termination to the host country. Muthana’s
    arguments to the contrary cannot be squared with the plain
    12
    meaning of the Convention and longstanding diplomatic
    practice. Second, in this case the State Department certified to
    the district court that it was notified of Muthana’s termination
    on February 6, 1995. Under our precedents, such certification
    provides conclusive evidence that Muthana enjoyed diplomatic
    immunity at the time of Hoda’s birth in October 1994, and
    therefore that Hoda did not become a U.S. citizen at birth.
    Finally, we cannot grant Muthana equitable relief because
    courts have no power to confer citizenship where it otherwise
    does not exist under the laws of the United States.
    A.
    Diplomatic immunity is governed by the Vienna
    Convention on Diplomatic Relations. See 23 U.S.T. 3227.
    When interpreting treaties, “we are guided by principles
    similar to those governing statutory interpretation.” Iceland
    S.S. Co., Ltd.-Eimskip v. Dep’t of Army, 
    201 F.3d 451
    , 458
    (D.C. Cir. 2000). Muthana argues that the Convention allows
    diplomatic immunity to cease on the date of his termination
    from his diplomatic post, which was prior to Hoda’s birth.
    Because he lost diplomatic immunity before his daughter’s
    birth, Muthana maintains that Hoda is a birthright citizen. The
    government argues that the Convention requires diplomatic
    immunity to continue until a reasonable period after
    notification of termination to the host country. Because the
    State Department was not notified of Muthana’s termination
    until after Hoda’s birth, she is not a citizen by virtue of her birth
    in the United States. “[T]he meaning attributed to treaty
    provisions by the Government agencies charged with their
    negotiation and enforcement is entitled to great weight.” Starr
    Int’l Co. v. United States, 
    910 F.3d 527
    , 537 (D.C. Cir. 2018)
    (quoting Sumitomo Shoji Am., Inc. v. Avagliano, 
    457 U.S. 176
    ,
    184–85 (1982)).
    13
    Here, the State Department’s interpretation comports with
    the plain meaning of the Convention that diplomatic immunity
    ceases when the host country is notified of the termination.
    Article 43 of the Convention states in full:
    The function of a diplomatic agent comes to an
    end, inter alia: (a) on notification by the sending
    State to the receiving State that the function of
    the diplomatic agent has come to an end; (b) on
    notification by the receiving State to the
    sending State that, in accordance with
    paragraph 2 of Article 9, it refuses to recognize
    the diplomatic agent as a member of the
    mission.
    23 U.S.T. 3227, art. 43. Article 39 of the Convention connects
    the end of diplomatic functions with diplomatic immunity,
    providing that “[w]hen the functions of a person enjoying
    privileges and immunities have come to an end, such privileges
    and immunities shall normally cease” when the diplomat
    leaves the country or after a “reasonable period in which to do
    so, but shall subsist until that time.” 
    Id.
     at art. 39. The text of
    the Convention plainly provides that a diplomat’s functions
    end upon “notification” to the receiving state and that
    diplomatic immunities continue from the date of notification
    for a “reasonable period” or until the diplomat leaves the
    country.
    This notification condition comports with longstanding
    principles of international law and state practice, which
    allowed diplomatic immunity to continue for a reasonable
    period after diplomatic service ended and thereby protected
    diplomats by giving them some breathing room to leave the
    country or to make other arrangements without exposure to the
    jurisdiction of the host country. See, e.g., Emer de Vattel, THE
    14
    LAW OF NATIONS bk. IV, ch. IX § 125 (B. Kapossy & R.
    Whatmore eds., 2008) (“[W]hen he is obliged to depart on any
    account whatever, his functions cease: but his privileges and
    rights do not immediately expire. … His safety, his
    independence, and his inviolability, are not less necessary to
    the success of the embassy in his return, than at his coming.”).
    The notification standard ensures that decisions regarding the
    status of diplomats generally turns on the determinations of the
    sending state.5 Luke T. Lee, CONSULAR LAW AND PRACTICE
    95 (2d ed. 1991) (explaining that the notification standard
    respects state sovereignty by preventing “the receiving State
    [from] investigating the internal administration of the foreign
    consular organization in order to determine what status the
    [diplomatic or consular officer] holds”); cf. Vattel, THE LAW
    OF NATIONS bk. IV, ch. IX § 78 (noting a sovereign’s exclusive
    control over its diplomatic missions abroad). Thus, under the
    plain meaning of the Convention, reinforced by historical
    practice, diplomatic immunity continues at least until the host
    country is notified of a diplomat’s termination.6
    5
    A receiving state can end the functions of a diplomat by following
    the requirements of Article 43(b), which requires notice to the
    sending state and then the provision of a “reasonable period” of
    continued immunity under Article 39.
    6
    The parallel evolution of consular immunity also bolsters the
    interpretation of termination and notification as distinct standards for
    governing the cessation of diplomatic functions. Before 1963, an
    individual possessing consular immunity, as opposed to full
    diplomatic immunity, generally lost such immunity immediately
    upon termination, rather than notification. The Vienna Convention
    on Consular Relations, however, ended “[t]he differential treatment
    accorded to consuls,” Lee, CONSULAR LAW AND PRACTICE 112, and
    replaced the termination standard with the notification standard,
    Vienna Convention on Consular Relations, Apr. 24, 1963,
    21 U.S.T. 77, art. 25(a). This history buttresses the conclusion that
    15
    To support his interpretation, Muthana asserts that the
    term “inter alia” in Article 43 demonstrates that diplomatic
    immunity can cease either on the date the receiving state is
    notified of termination or the date of actual termination.
    Muthana argues that “inter alia” is a term of illustration, not of
    exclusion, so although notification is an example of when
    diplomatic immunity may cease, it is not the only standard.
    According to Muthana, Article 43 does not foreclose
    an interpretation that diplomatic immunity ends as of the
    date of termination.7 He reasons that, because termination is a
    possible standard, the State Department’s decisions in 2005
    and 2014 to issue a passport to Hoda were exercises of the
    Department’s “discretion” to determine that Muthana did not
    have diplomatic immunity at the time of Hoda’s birth.
    Muthana’s arguments, however, cannot be squared with
    the text, structure, purpose, and history of the Convention. As
    notification and termination are distinct periods for marking the end
    of diplomatic immunity.
    7
    Muthana’s reliance on Raya v. Clinton, 
    703 F. Supp. 2d 569
    , 578
    (W.D. Va. 2010), is misplaced because that case concerned a
    termination that occurred after notification. In Raya, Egypt notified
    the United States in advance that a diplomat’s functions would
    terminate in a few days. This notification meant that the diplomat’s
    immunity would continue until he left the country or the expiry of a
    reasonable period in which to do so. Id.; see also 23 U.S.T. 3227,
    arts. 39 & 43. Because notification occurred before termination, the
    termination date informed how long the diplomat’s immunity would
    subsist for the “reasonable period” for him to leave the country. See
    Raya, 
    703 F. Supp. 2d at 578
    . Here Muthana was terminated before
    the United States was notified of his termination and the relevant
    legal question in this case is about the date of notification of
    termination, not about the length of a “reasonable period” for
    continued immunity after notification.
    16
    already discussed, the plain meaning of the Convention
    provides for a diplomat’s functions to continue until
    notification of termination to the receiving state. The
    Convention’s use of “inter alia” in Article 43 refers to other
    established circumstances that might end diplomatic functions,
    such as the death of a diplomat, the extinction of the sending
    or receiving state, a regime change, severance of diplomatic
    relations, and war. See, e.g., 23 U.S.T. 3227, art. 39(3) (death
    of a diplomat), art. 45 (war and severance of diplomatic
    relations). Thus, “‘inter alia’, as used in the Vienna
    Convention indicate[s] also the existence of other conditions.
    All of these are now described.” Lee, CONSULAR LAW AND
    PRACTICE 94. What “inter alia” does not include is allowing
    diplomatic immunity to turn on termination, a condition
    nowhere specified in the Convention and inconsistent with
    longstanding diplomatic practice.
    Muthana’s reading of coexisting termination and
    notification standards also runs afoul of one of the purposes of
    the Convention, namely to provide certainty and clarity in
    diplomatic relations. If either termination or notification of
    termination could govern the end of a diplomat’s functions,
    diplomats could not be certain of the continuation of their
    immunity and host countries would not be certain of the status
    of lingering diplomats. See id. at 93 (explaining that
    international crises have arisen due to disagreement and
    confusion over when diplomatic immunity terminates). The
    Convention seeks to establish uniform standards for the
    diplomatic intercourse between nations in order to promote
    predictability and reciprocity. See id. (highlighting the
    importance of a “[c]lear statement of the condition under which
    the consular status of an individual terminates”) (citation and
    quotation marks omitted); see also 23 U.S.T. 3227 pmbl.
    (explaining the Vienna Convention was created to ensure there
    is “an international convention on diplomatic intercourse” to
    17
    “contribute to the development of friendly relations among
    nations, irrespective of their differing constitutional and social
    systems”). As the government stresses here, the Convention
    “serves to protect United States diplomats abroad, which is a
    critical national interest of the United States.” Gov’t Br. 6. An
    interpretation that renders the standard governing the end of
    diplomatic immunity uncertain would provide less protection
    to diplomats and the nations they represent and could
    undermine reciprocal treatment of American diplomats abroad.
    Finally, although the State Department has some
    discretion over questions of diplomatic immunity even within
    the terms of the Convention,8 the government does not suggest
    that such discretion was exercised here to deny Muthana
    diplomatic immunity before notification of his termination and
    thereby to recognize Hoda’s citizenship by birth. To the
    contrary, the government maintains that at the time of Hoda’s
    birth, Muthana continued to enjoy diplomatic privileges and
    immunities. In addition to its certification, the government
    presented several contemporaneous records corroborating that
    Muthana had diplomatic status after Hoda’s birth. For example,
    it presented a file from the U.N. Office of Protocol reflecting
    that Muthana’s diplomatic status continued until February 6,
    1995. S.A. 109. The government maintains that the issuance of
    a passport to Hoda in 2005 and 2014 was in error. It would
    seem far afield of the judicial role to convert a government
    error into an exercise of executive discretion in the sensitive
    8
    For example, the Diplomatic Relations Act vests the President with
    the authority to “specify [diplomatic privileges] … which result in
    more favorable treatment or less favorable treatment than is provided
    under the Vienna Convention,” and he may do so “on the basis of
    reciprocity and under such terms and conditions as he may
    determine.” 22 U.S.C. § 254c(a).
    18
    arena of diplomatic relations.
    Consistent with historical practice, the Vienna Convention
    explicitly recognizes that diplomatic functions continue until
    notification of termination to the host country and that
    immunity is maintained for some “reasonable period” after
    such notification. We therefore hold that Muthana’s diplomatic
    immunity continued at least until the United States was notified
    of his termination by Yemen.
    B.
    Whether Hoda and John Doe are citizens depends on
    whether Muthana enjoyed diplomatic immunity at the time of
    Hoda’s birth. Under the Vienna Convention, the question turns
    on one dispositive fact: when was the United States notified
    that Muthana was no longer a diplomat? The State Department
    certified to the district court that the United States received
    notice of Muthana’s termination on February 6, 1995. The
    district court accepted this certification as conclusive proof that
    Muthana had diplomatic immunity when his daughter was born
    in October 1994. Muthana attempts to rebut this conclusion by
    relying on a document obtained when applying for Hoda’s
    passport. That letter states Muthana was “notified to the United
    States Mission” as a diplomat from October 15, 1990, to
    September 1, 1994. In light of more than a century of binding
    precedent that places the State Department’s formal
    certification of diplomatic status beyond judicial scrutiny, we
    conclude the certification is conclusive and dispositive
    evidence as to the timing of Muthana’s diplomatic immunity.
    With no dispute of material fact, summary judgment for the
    government was appropriate.
    The Constitution vests the President with the sole power
    to “receive Ambassadors and other public Ministers.”
    19
    U.S. CONST. art. II, § 1 (“The executive Power shall be vested
    in a President of the United States of America.”), § 3 (“[H]e
    shall receive Ambassadors and other public Ministers.”). The
    Reception Clause recognizes the President’s authority to
    determine the status of diplomats, a fact long confirmed by all
    three branches. See, e.g., Crimes Act of 1790 ch. IX § 25, 
    1 Stat. 112
    , 117–18; Presidential Power to Expel Diplomatic
    Personnel from the United States, 4A Op. O.L.C. 207, 208–09
    (Apr. 4, 1980); In re Baiz, 
    135 U.S. 403
    , 432 (1890). Just as
    the President is vested with the “exclusive” power to recognize
    foreign governments, Zivotofsky ex rel. Zivotofsky v. Kerry,
    
    576 U.S. 1
    , 17 (2015), his “action in … receiving … diplomatic
    representatives is conclusive on all domestic courts,” Guar. Tr.
    Co. of N.Y. v. United States, 
    304 U.S. 126
    , 138 (1938).
    Recognizing the vesting of these diplomatic powers with
    the President, courts have afforded conclusive weight to the
    Executive’s determination of an individual’s diplomatic status.
    See In re Baiz, 
    135 U.S. at 432
     (Courts may not “sit in
    judgment upon the decision of the executive in reference to the
    public character of a person claiming to be a foreign
    minister.”). Justice Bushrod Washington, riding circuit,
    explained why the Constitution compels this rule:
    The constitution of the United States having
    vested in the president the power to receive
    ambassadors and other public ministers, has
    necessarily bestowed upon that branch of the
    government, not only the right, but the
    exclusive right, to judge of the credentials of the
    ministers so received; and so long as they
    continue to be recognized and treated by the
    president as ministers, the other branches of the
    government are bound to consider them as such.
    20
    United States v. Ortega, 
    27 F. Cas. 359
    , 361 (C.C.E.D. Pa.
    1825) (Washington, J.). This understanding has survived to the
    present day. See Carrera v. Carrera, 
    174 F.2d 496
    , 497–98
    (D.C. Cir. 1949); Zdravkovich v. Consul Gen. of Yugoslavia,
    
    1998 WL 389086
    , at *1 (D.C. Cir. June 23, 1998) (“The courts
    are required to accept the State Department’s determination
    that a foreign official possesses diplomatic immunity from
    suit.”).9
    In litigation implicating the status of diplomats, the courts
    and the Executive have developed a practice in which the
    Executive submits a certification of a diplomat’s status to the
    court. For example, in Carrera, we explained that the
    Executive’s certification of immunity is entitled to conclusive
    weight when it is “transmitted to the district judge” by the State
    Department: “It is enough that an ambassador has requested
    immunity, that the State Department has recognized that the
    person for whom it was requested is entitled to it, and that the
    Department’s recognition has been communicated to the
    court.” 
    174 F.2d at 497
    . We noted that this was the process that
    was “approved by the Supreme Court in In re Baiz.” Id.; see
    also United States v. Al-Hamdi, 
    356 F.3d 564
    , 569 (4th Cir.
    2004); Abdulaziz v. Met. Dade County, 
    741 F.2d 1328
    , 1330–
    31 (11th Cir. 1984); 4A Op. O.L.C. at 208–09. In this case, the
    State Department has submitted under this longstanding
    process a formal certification that the United States was
    notified of Muthana’s termination from his diplomatic position
    9
    This view is also uniformly maintained by our sister circuits. See,
    e.g., United States v. Al-Hamdi, 
    356 F.3d 564
    , 568, 573 (4th Cir.
    2004); Abdulaziz v. Met. Dade County, 
    741 F.2d 1328
    , 1331 (11th
    Cir. 1984); United States v. Lumumba, 
    741 F.2d 12
    , 15 (2d Cir. 1984)
    (“[R]ecognition by the executive branch—not to be second-guessed
    by the judiciary—is essential to establishing diplomatic status.”).
    21
    on February 6, 1995.
    In response, Muthana argues that the certification is not
    conclusive as to the dates of immunity because the district
    court was required to weigh the additional evidence he
    submitted, which he claims at least creates a dispute of material
    fact sufficient to prevent summary judgment. Specifically,
    Muthana attached a 2004 letter from Russell Graham (the
    “Graham Letter”), in which the United States Mission to the
    United Nations informed the Bureau of Citizenship and
    Immigration Services that Muthana was “notified to the United
    States Mission” as a diplomat from October 15, 1990, to
    September 1, 1994. Muthana argues that the district court
    should have given more weight to the Graham Letter than the
    State Department’s certification, which was produced twenty
    years after Hoda’s birth and after this lawsuit was filed.
    Because the Graham Letter was dated from before Hoda
    received her passport, Muthana suggests the Letter
    demonstrates that the State Department understood he was not
    in a diplomatic role when Hoda was born.
    Even on its own terms, however, the Graham Letter
    creates no dispute over the relevant legal fact of when the
    United States was notified of Muthana’s termination. The
    Graham Letter notes only two dates: Muthana’s date of
    appointment as a diplomat, October 15, 1990, and his date of
    termination, September 1, 1994. The Graham Letter merely
    addresses the duration of Muthana’s diplomatic position and
    when it was terminated. The Graham Letter says nothing about
    when the United States was notified of Muthana’s termination
    and therefore when his diplomatic immunity ended.
    In any event, we must accept the State Department’s
    formal certification to the Judiciary as conclusive proof of the
    dates of diplomatic immunity. See, e.g., Carrera, 
    174 F.2d at
    22
    497. The Executive’s determination cannot be attacked by
    “argumentative or collateral proof.” See In re Baiz, 
    135 U.S. at 432
    . When a diplomat has been recognized by the Executive,
    “the evidence of those facts is not only sufficient, but in our
    opinion, conclusive upon the subject of his privileges as a
    minister.” Ortega, 27 F. Cas. at 362. See also Carrera, 
    174 F.2d at 498
     (“[T]he Secretary having certified Carrera’s name
    as included in the list, judicial inquiry into the propriety of its
    listing was not appropriate.”); Al-Hamdi, 
    356 F.3d at 573
    (explaining that the State Department’s certification “is
    conclusive evidence as to [] diplomatic status”). The State
    Department made a formal certification in this case, and it
    cannot be undermined by collateral evidence such as the
    Graham Letter, a document of unknown provenance that
    Muthana attached to his complaint.
    By accepting the certification as conclusive, we decline to
    second-guess the Executive’s recognition of diplomatic status.
    If courts could rely upon extrinsic evidence submitted by
    private parties to impeach the credibility of the Executive’s
    formal certification, the certification would not be conclusive,
    and the courts rather than the Executive would have the
    final say with respect to recognizing a diplomat’s immunity. 10
    See United States v. Pink, 
    315 U.S. 203
    , 230 (1942) (“We
    10
    Contrary to the concurring opinion, the State Department argued
    that its certification was “conclusive” and “dispositive.” Gov’t Br.
    30–31. When discussing the effect of the Graham Letter at oral
    argument, the State Department argued that, “under Baiz,” its
    certification “ha[s] a special status here.” Oral Arg. Tr. 25:3–4; see
    also Oral Arg. Tr. 17:1–3. Indeed, the Department advanced in its
    brief the argument the court adopts today: “Under established law
    that has been consistent for over a century, when the Department of
    State certifies the diplomatic status of an individual, the courts are
    bound to accept that determination.” Gov’t Br. 25 (citation and
    quotation marks omitted).
    23
    would usurp the executive function if we held that that [the
    recognition] decision was not final and conclusive in the
    courts.”). The district court properly held that the State
    Department’s certification is conclusive proof of the dates of
    Muthana’s immunity and declined Muthana’s request to look
    behind the certification or to order discovery.
    Under the Vienna Convention, immunity continues at least
    until notification of termination, and the State Department here
    certified to the district court that notification of Muthana’s
    termination occurred on February 6, 1995. Thus, Muthana
    possessed diplomatic immunity when his daughter was born in
    October 1994. As a consequence, Hoda Muthana was not born
    “subject to the jurisdiction” of the United States and is not a
    citizen by birth under the Fourteenth Amendment. See Nikoi,
    
    939 F.2d at 1066
    . This also means that John Doe did not
    acquire citizenship based on parentage under 
    8 U.S.C. § 1401
    (g), since neither of his parents was a U.S. citizen when
    he was born.
    C.
    Muthana also seeks equitable relief. He maintains that the
    government should be equitably estopped from “stripping”
    Hoda of her U.S. citizenship. He contends the State
    Department previously determined that Muthana’s diplomatic
    post terminated prior to Hoda’s birth when it issued her a
    passport in 2005, recognizing her right to citizenship by birth.11
    11
    Muthana sensibly does not rest his argument solely on the State
    Department’s issuance and subsequent revocation of Hoda’s
    passport. As Muthana acknowledges, a passport “does not confer
    citizenship upon its recipient.” Hizam v. Kerry, 
    747 F.3d 102
    , 109
    (2d Cir. 2014). The Secretary of State is authorized to “cancel any
    United States passport … if it appears that such document
    was … erroneously obtained from … the Secretary,” 8 U.S.C.
    24
    Muthana also highlights the unfairness created by the State
    Department’s issuance and subsequent revocation of Hoda’s
    passport. He explains that, had he known Hoda was not born a
    U.S. citizen, he would have pursued the naturalization process
    for her, as he did for himself, his wife, and their other children.
    Although Muthana may have had a good faith
    understanding that his daughter acquired citizenship at birth,
    an error initially shared by the State Department, the law
    affords Muthana no relief. As we have explained, Hoda has
    never been a U.S. citizen and therefore the State Department
    revoked her passport, but could not strip her of a citizenship
    she never lawfully enjoyed. Even if the State Department
    previously recognized Hoda as a citizen as Muthana contends,
    the Executive can only recognize lawful citizenship, and Hoda
    did not acquire citizenship at birth because her parents had
    diplomatic immunity. We cannot now order the State
    Department to recognize Hoda’s citizenship, because she is not
    a citizen under the Constitution or laws of the United States.
    The Executive has no authority to confer citizenship on Hoda
    outside of the naturalization rules created by Congress.12
    § 1504(a), and the State Department cancelled Hoda’s passport in
    2016. Thus, the State Department’s issuance, renewal, and
    revocation of Hoda’s passport cannot settle her claim to citizenship.
    12
    The Constitution vests the exclusive power “[t]o establish an
    uniform Rule of Naturalization” in Congress. U.S. CONST. art. I, § 8;
    Chirac v. Chirac’s Lessee, 
    15 U.S. 259
    , 269 (1817) (Marshall, C.J.)
    (“[T]he power of naturalization is exclusively in congress.”). The
    Executive cannot unilaterally confer citizenship. Congress may,
    however, grant citizenship through private bills, which are generally
    reserved for “cases that are of such an extraordinary nature that an
    exception to the law is needed.” H.R. COMM. ON THE JUDICIARY,
    SUBCOMM. ON IMMIGR. & CITIZENSHIP, 116TH CONG., RULES OF
    25
    Nor do the courts have an equitable power to grant
    citizenship. “Neither by application of the doctrine of estoppel,
    nor by invocation of equitable powers, nor by any other means
    does a court have the power to confer citizenship in violation
    of these limitations.” INS v. Pangilinan, 
    486 U.S. 875
    , 885
    (1988); Fedorenko v. United States, 
    449 U.S. 490
    , 506 (1981)
    (“Congress alone has the constitutional authority to prescribe
    rules for naturalization.”) (citing U.S. CONST. art. I, § 8).
    Having held that Hoda is not a citizen under the Fourteenth
    Amendment and her son is not a citizen under 
    8 U.S.C. § 1401
    (g), we cannot confer citizenship through equity.
    ***
    For the foregoing reasons, we affirm the district court’s
    conclusion that Hoda Muthana and her son are not, and never
    have been, citizens of the United States.
    IV.
    Having held that Hoda and her son are not citizens, the
    district court properly denied Muthana’s mandamus petition.
    Rather than grant the government summary judgment on this
    count, however, the district court should have dismissed
    Muthana’s mandamus claims for lack of subject matter
    jurisdiction. Under 
    28 U.S.C. § 1361
    , “[a] court may grant
    mandamus relief only if: (1) the plaintiff has a clear right to
    relief; (2) the defendant has a clear duty to act; and (3) there is
    no other adequate remedy available to plaintiff.” Baptist Mem’l
    Hosp. v. Sebelius, 
    603 F.3d 57
    , 62 (D.C. Cir. 2010) (cleaned
    up). “These three threshold requirements are jurisdictional;
    unless all are met, a court must dismiss the case for lack of
    PROC. & STATEMENT OF POL’Y FOR PRIV. IMMIGR. BILLS, at 3
    (2019).
    26
    jurisdiction.” Am. Hosp. Ass’n v. Burwell, 
    812 F.3d 183
    , 189
    (D.C. Cir. 2016). Thus, “mandamus jurisdiction under § 1361
    merges with the merits.” Lovitky v. Trump, 
    949 F.3d 753
    , 759
    (D.C. Cir. 2020) (citation and quotation marks omitted).
    Muthana sought a writ of mandamus obligating the United
    States to use all available means to return his daughter and
    grandson to the United States. To do so, he asked the court to
    “order the government to affect her return to the United States,
    including but not limited to the use of military or other
    government aircraft.” Pl.’s Mem. in Support 21, Muthana v.
    Pompeo, No. 1:19-cv-00445-RBW (D.D.C. Mar. 1, 2019),
    ECF No. 15. Not even citizens have a clear right to assistance
    from the U.S. government in coming to U.S. territory, so aliens
    certainly have none. Accordingly, Hoda and her son lack any
    right to this relief. We therefore remand this claim and direct
    the district court to dismiss Muthana’s mandamus petition for
    lack of subject matter jurisdiction.
    V.
    Finally, the district court correctly dismissed for lack of
    standing Muthana’s claim for a declaratory judgment that he
    would not violate the prohibition on providing material support
    for terrorism if he sent money and supplies to his daughter and
    grandson. See 18 U.S.C. § 2339B. In pursuing this claim,
    Muthana proceeded in his personal capacity rather than as next
    friend to his daughter and grandson. The district court held that
    he lacked standing because he failed to identify a personal
    constitutional right that would be affected by the enforcement
    of the statutory prohibition on providing material support for
    terrorism. We agree.
    To establish standing for a preenforcement challenge, a
    plaintiff must demonstrate first “an intention to engage in a
    27
    course of conduct arguably affected with a constitutional
    interest, but proscribed by a statute” and, second, that “there
    exists a credible threat of prosecution thereunder.” Susan B.
    Anthony List v. Driehaus, 
    573 U.S. 149
    , 159 (2014) (citation
    and quotation marks omitted). Muthana’s claim fails under the
    first requirement because he did not allege that the material
    support statute was unconstitutional as applied to his intended
    conduct. Instead, he argued that he would not violate the statute
    by sending support to Hoda because she was no longer engaged
    in terrorist activity.
    Preenforcement review is not a vehicle to settle questions
    of statutory interpretation unconnected with matters of
    constitutional right. Instead, preenforcement review is limited
    and appropriate only to relieve a plaintiff from the necessity of
    “first expos[ing] himself to actual arrest or prosecution” before
    he can “challenge [the] statute that he claims deters the exercise
    of his constitutional rights.” Steffel v. Thompson, 
    415 U.S. 452
    ,
    459 (1974). The district court properly rejected Muthana’s
    standing to seek review of the applicability of the
    material support statute absent a claim of constitutional right.13
    Accordingly, we affirm the dismissal of this count for lack of
    subject matter jurisdiction.
    ***
    Muthana focuses his lawsuit on the hardship resulting
    13
    For the first time on appeal, Muthana argues that the material
    support statute unconstitutionally burdens his right to free
    association. Because it is “not the province of an appellate court to
    hypothesize or speculate about the existence of an injury Plaintiff did
    not assert to the district court,” we decline to consider this new theory
    of standing on appeal. Huron v. Cobert, 
    809 F.3d 1274
    , 1280 (D.C.
    Cir. 2016) (cleaned up).
    28
    from the revocation of his daughter’s passport and the State
    Department “stripping away” her citizenship. Yet Hoda was
    not born a United States citizen because her father possessed
    diplomatic immunity when she was born and therefore she was
    not born subject to the jurisdiction of the United States. See
    U.S. CONST . amend. XIV, § 1. Hoda’s son, who was born
    abroad to two non-citizen parents, could not have acquired
    citizenship. See 
    8 U.S.C. § 1401
    (g). Therefore, we affirm in
    part the grant of summary judgment to the government because
    neither Hoda Muthana nor John Doe have ever been citizens of
    the United States. We also affirm the district court’s dismissal
    for lack of jurisdiction of Muthana’s claim for preenforcement
    review of the material support for terrorism statute. Because
    the district court lacked jurisdiction over Muthana’s petition
    for a writ of mandamus, it must be dismissed on remand.
    So ordered.
    TATEL, Circuit Judge, concurring in the judgment:
    Although this case touches on a critical provision of the
    Fourteenth Amendment—the “Jurisdiction Clause”—it could
    have been resolved on the most routine of grounds. Both parties
    agree that this dispute turns on when the United States Mission
    received “notification” of Ahmed Ali Muthana’s termination
    from his role as a diplomat with the Yemeni Mission to the
    United Nations. If the United States Mission received that
    notification before Muthana’s daughter’s birth in October
    1994, she is a citizen of the United States; otherwise, she is not.
    The record contains two documents purporting to speak to
    Muthana’s diplomatic tenure: a 2004 letter from Russell
    Graham stating that Muthana was “notified to the United States
    Mission” as a diplomat from October 15, 1990, to September
    1, 1994, and a 2019 letter from James Donovan stating that
    Muthana and his family possessed diplomatic immunity until
    February 6, 1995. But as even this court agrees, Majority Op.
    at 21–22, nothing in the Graham letter contradicts the Donovan
    letter’s statement that the United States received notification of
    Muthana’s termination on February 6, 1995. We therefore
    could have easily resolved this case on the ground that there is
    no genuine issue of material fact as to the date of notification,
    just as the government argued in the district court, just as Judge
    Walton concluded, and just as the government urges here.
    Indeed, we could have done so by judgment.
    Yet the court reaches out to affirm on the basis of an
    argument not raised by the government and not surfaced by the
    court at oral argument: that we must ignore the Graham letter
    entirely and look to the contents of the Donovan letter alone
    because that is the document the executive branch “formally”
    transmitted to the court in the course of litigation. Such a
    holding is not only unnecessary, but wrong.
    The court begins its analysis with “a century of binding
    precedent that places the State Department’s formal
    2
    certification of diplomatic status beyond judicial scrutiny.”
    Majority Op. at 19. So far so good. Over a century ago, the
    Supreme Court announced in In re Baiz, 
    135 U.S. 403
     (1890),
    that because “we do not assume to sit in judgment upon the
    decision of the executive in reference to the public character of
    a person claiming to be a foreign minister,” “the certificate of
    the Secretary of State . . . is the best evidence to prove the
    diplomatic character of a person.” 
    Id. at 432, 421
     (emphasis
    added). Were the Donovan letter the only State Department
    certification in the record, that uncontroversial statement of law
    would make this an even easier case.
    The problem, of course, is that the record contains not one
    but two documents purporting to be certifications. Both the
    Graham and Donovan documents appear on the letterhead of
    the United States Mission, carry the United States seal, and
    bear the signature of the Minister Counselor for Host Country
    Affairs. Both, moreover, contain the same opening words:
    “This is to certify that . . . .” Joint Appendix 12, 18 (emphasis
    added). Based on only the four corners of the two documents,
    both would appear to qualify as the “best evidence to prove the
    diplomatic character of a person.”
    The court sidesteps the problem of dueling certifications
    by describing the Donovan document as a “formal certification
    to the Judiciary” submitted to the court pursuant to a
    “longstanding process.” Majority Op. at 21–22. But the court
    never explains why the Donovan document, and not the
    Graham document, is “formal” despite both bearing the same
    indicia of institutional legitimacy. Nor does the court point to
    any evidence, record or otherwise, that a longstanding formal
    procedure for communicating the Executive’s view of
    diplomatic status to the court exists. Instead, it simply assumes
    that the way such information reached the court in a handful of
    prior cases reflects a longstanding formal procedure. But those
    3
    decisions describe only the facts before the court in each, not
    any formal procedure.
    Without saying so outright, the court appears to adopt a
    novel rule: that the term “certification” somehow refers only to
    a “formal certification to the Judiciary” submitted by the
    Executive in connection with litigation. Majority Op. at 22.
    That rule suffers from two major flaws.
    First, the government nowhere advances the court’s
    theory—not in its brief and not at oral argument. See
    Carducci v. Regan, 
    714 F.2d 171
    , 177 (D.C. Cir. 1983) (“The
    premise of our adversarial system is that appellate courts do not
    sit as self-directed boards of legal inquiry and research, but
    essentially as arbiters of legal questions presented and argued
    by the parties before them.”). To be sure, as my colleagues
    observe, Majority Op. at 22 n.10, the government does contend
    that the Donovan letter was “conclusive” and “dispositive.”
    Appellees’ Br. 30–31. But the government does not contend
    that the Donovan letter was the sole “certification,” and thus
    “dispositive,” by virtue of the Executive submitting it to the
    court during this case. The court nonetheless claims to divine
    such an argument from the government’s statement that “when
    the Department of State certifies the diplomatic status of an
    individual, the courts are bound to accept that determination.”
    Majority Op. at 22 n.10. That statement, however, says nothing
    about what makes one document and not another a
    “certification”—the critical question here—and certainly says
    nothing to suggest that submission during the course of
    litigation is dispositive. The government simply declares that
    the Donovan letter “ends the factual inquiry into Plaintiff’s
    diplomatic status at the time of [his daughter’s] birth,”
    Appellees’ Br. 25–26, before going on to argue that the Graham
    letter “failed to . . . refute th[e] date” contained in the Donovan
    document, id. at 31. I think it especially unwise to adopt a rule
    4
    that turns on government submission of a document when the
    government itself advances no such rule.
    Second, no case supports the court’s new rule. Although
    the court seeks to house its theory in In re Baiz, 
    135 U.S. 403
    (1890), and Carrera v. Carrera, 
    174 F.2d 496
     (D.C. Cir. 1949),
    neither case speaks to how a court differentiates between two
    seemingly authentic State Department documents. To be sure,
    the Court held in In re Baiz that “the certificate of the Secretary
    of State . . . is the best evidence to prove the diplomatic
    character of a person.” 
    135 U.S. at 421
     (emphasis added). But
    in that case, the Court rejected the petitioner’s claim to
    immunity because there was no certification at all, so the
    question of submission was not before the Court. And in
    Carrera, the plaintiff challenged the only purported
    certification on the ground that it was submitted ex parte and
    therefore “not properly presented to the District Court.” 
    174 F.2d at 497
    . Rejecting that argument, our court held that “the
    process by which the claim of immunity . . . was communicated
    to the court” was proper. 
    Id.
     Carrera, in other words, suggests
    that a court can consider a State Department certification
    (which, per In re Baiz, is the “best evidence” of diplomatic
    status) no matter how that certification makes its way to the
    district court. Nothing in either opinion suggests that
    submission by the government during litigation somehow
    elevates one authentic State Department document over
    another; the issue was just not before either court.
    Nor do decisions citing In re Baiz and Carrera address the
    issue of dueling documents. In Abdulaziz v. Metropolitan Dade
    County, 
    741 F.2d 1328
     (11th Cir. 1984), for example, the
    Eleventh Circuit relied on a State Department certification and
    rejected the argument that it should conduct an independent
    inquiry into whether the individual fell outside the protections
    of the Vienna Convention, or “was apparently eligible for, but
    5
    had not been granted diplomatic status at the time he initiated
    [suit].” 
    Id. at 1331
    . In United States v. Al-Hamdi, 
    356 F.3d 564
    (4th Cir. 2004), the Fourth Circuit likewise concluded that,
    having been presented with a “State Department[] certification
    . . . based on a reasonable interpretation of the Vienna
    Convention,” the court would “not review the State
    Department’s factual determination that, at the time of his
    arrest, Al-Hamdi fell outside of the immunities of the Vienna
    Convention.” 
    Id. at 571, 573
    . Neither case addressed the
    question we face here: what to do when there are two state
    department documents purporting to address diplomatic status.
    Of course, our review is limited in this sensitive arena.
    Article II of the Constitution gives the President the power to
    “receive Ambassadors and other public Ministers,” which is
    precisely why the Supreme Court crafted the “best evidence”
    rule in In re Baiz: to prevent the judiciary from “sit[ting] in
    judgment upon the decision of the executive in reference to the
    public character of a person claiming to be a foreign minister.”
    
    135 U.S. at 432
    . Nothing in the Constitution or case law,
    however, requires that we credit the Executive’s litigating
    position to the exclusion of all other Executive evidence, no
    matter how authoritative.
    Under the court’s new rule, had Muthana produced a
    document identical to Donovan’s letter in every way except for
    stating “this is to certify that the United States Mission received
    notification not in February 1995, but in July 1994,” it would
    have been improper to even consider that evidence. The case
    law does not require such a result, the government does not
    seek it, and we can straightforwardly resolve this case on the
    same ground Judge Walton did—that “the Graham certification
    . . . speak[s] to the date of [Muthana’s] termination . . . , not the
    date when the United States Mission was notified of [his]
    6
    termination.” Muthana v. Pompeo, No. 19-cv-00445, slip op.
    at 21 (D.D.C. Dec. 17, 2019).