Birthright Citizenship and the Jurisdiction Requirement

Executive summary

The Fourteenth Amendment declares that “all persons born or naturalized in the United States, and subject to the jurisdiction thereof,” are citizens. The prevailing practice today treats birth on U.S. soil as very nearly sufficient by itself. NCI’s position is that the bolded phrase does real work: it requires allegiance-owing subjection to the United States, not mere presence within its borders. On that reading, the children of foreign diplomats have never been citizens — and the children of aliens who are in the country unlawfully or only temporarily were not the intended beneficiaries of the clause either.

We argue that this reading is the better account of the amendment’s text and history, and that the Supreme Court’s leading nineteenth-century case, United States v. Wong Kim Ark, is best read as limited to children of permanently domiciled parents. We also state the current law plainly: on June 30, 2026, in Trump v. Barbara, the Supreme Court rejected this limiting reading, reaffirmed Wong Kim Ark in broad terms, and held that children born here to parents unlawfully or temporarily present are citizens at birth. Our position is that Barbara is wrong on the original understanding — this paper makes that case — but it is the law, and we will not pretend otherwise.

The road forward therefore runs through Congress and the amendment process: federal legislation of the kind Justice Kavanaugh’s Barbara concurrence expressly contemplated, which would present the constitutional question to the Court squarely; and a constitutional amendment as the durable resolution. Executive action is not a path at all — the 2025 executive order was enjoined by every court to review it and then struck down.

This is a work of legal and policy analysis and advocacy. We state the strongest version of the opposing case in the Counterarguments section, and we distinguish what the sources establish from what we conclude from them.

Background

Citizenship by birth on soil (jus soli) operated in American law from the founding, through the inherited English common-law rule; the Fourteenth Amendment’s Citizenship Clause — ratified in 1868 to overturn Dred Scott and secure citizenship for the freedmen — wrote a version of that rule into the Constitution’s text. Its statutory forerunner, the Civil Rights Act of 1866, used different language: it conferred citizenship on persons born in the United States “and not subject to any foreign power, excluding Indians not taxed.” When the same Congress wrote the constitutional text weeks later, it chose the phrase “subject to the jurisdiction thereof.”

Two early questions shaped how that phrase was understood:

Diplomats and hostile forces. It was common ground that the children of foreign ambassadors, and of members of an invading army, were not citizens even if born on U.S. soil. The exclusions were undisputed; their rationale is where readings divide — the conventional account grounds them in immunity from U.S. law, while we read them as resting on allegiance owed elsewhere.
Native Americans. Members of tribes were long held to be outside the clause, because they owed allegiance to their own sovereigns; Congress did not extend citizenship to all Native Americans until the Indian Citizenship Act of 1924.

On our reading — argued, not assumed, in the Analysis below — both carve-outs turn on the same idea: allegiance, not geography.

Analysis

The text and the drafters

The clause could have said “all persons born in the United States are citizens.” It does not. It adds a condition — subjection to the jurisdiction — and the drafters explained what they meant by it.

Senator Jacob Howard, who introduced the clause, described its reach in a sentence both sides of this debate still argue over. In full: the clause “will not, of course, include persons born in the United States who are foreigners, aliens, who belong to the families of ambassadors or foreign ministers accredited to the Government of the United States, but will include every other class of persons.” We quote the whole sentence deliberately, because its closing phrase is the strongest textual point against our reading, and it deserves to be met rather than avoided. The dispute is over the middle of the sentence: on the majority’s reading, “foreigners, aliens, who belong to the families of ambassadors” is one narrow category (diplomatic families), so “every other class” sweeps in essentially everyone else born here. On our reading, “foreigners, aliens” describes a class defined by foreign allegiance — with ambassadors’ families as the clearest example — so “every other class” refers to those who do owe the United States their direct allegiance.

Two things push us toward the allegiance reading. First, Senator Lyman Trumbull, author of the 1866 Act, explained on the same days of debate that “subject to the jurisdiction” meant subject to the complete jurisdiction of the United States — “not owing allegiance to anybody else.” Second, that is how the Supreme Court itself first construed the phrase (see Elk, below). Taken together, the drafting history reads most naturally as requiring more than physical presence and amenability to the police power: it requires the kind of full, allegiance-owing membership that a foreign diplomat — or a person who remains the subject of, and answerable to, another nation — does not have.

Elk v. Wilkins

In Elk v. Wilkins (1884), the Court held that a Native American born in the United States was not a birthright citizen, because he was born “subject to” a tribal power and not “completely subject to the[] political jurisdiction” of the United States, owing it “direct and immediate allegiance.” We read Elk as confirming that “subject to the jurisdiction” is an allegiance test, not a mere-presence test — otherwise the case would have come out the other way. We acknowledge that Wong Kim Ark later confined Elk to the tribal context and that the Court’s 2026 decision reaffirmed that narrower treatment; the broader force we assign Elk is our judgment, not the courts’.

Wong Kim Ark and its limits

The decision most often cited against our position is United States v. Wong Kim Ark (1898), which held that a man born in San Francisco to Chinese parents was a citizen. But the parents in that case were permanently domiciled in the United States — lawfully so, on the facts of the time — carrying on business here, and were neither diplomats nor a hostile force. The Court’s opinion returns repeatedly to that fact, in its own phrase: the parents’ “permanent domicil and residence.” Wong Kim Ark therefore answers a specific question: whether the child of lawful, settled immigrants is a citizen. It did not decide whether the child of parents who are in the country unlawfully, or only as temporary visitors, is a citizen. Reading the case to reach that further question extends it beyond its facts and its reasoning.

We state plainly what candor requires: not only had no court adopted this limiting reading — the Supreme Court has now squarely rejected it. In Trump v. Barbara (2026), discussed next, the Court reaffirmed Wong Kim Ark in broad terms and held that the children of unlawfully or temporarily present parents are citizens at birth. Our claim is therefore not that the limit is the law. It is that confining Wong Kim Ark to its facts was the better-reasoned account of the 1898 holding, and that Barbara extended it in a way the original understanding does not support.

Trump v. Barbara (2026)

In January 2025, an executive order attempted to deny citizenship at birth to children of parents unlawfully or temporarily present. Every court to review the order enjoined it, and on June 30, 2026, the Supreme Court struck it down. Chief Justice Roberts, writing for five justices, held that such children “are citizens at birth” under the Citizenship Clause, reaffirming Wong Kim Ark. Three justices dissented from the constitutional holding.

The opinion that matters most for what comes next is Justice Kavanaugh’s. He concurred in the judgment only, resting on the statute rather than the Constitution: 8 U.S.C. § 1401(a), enacted in 1952, independently grants citizenship in the same “born … and subject to the jurisdiction” terms, and an executive order cannot override an act of Congress. And he said expressly what that implies: Congress “could amend” that law “or otherwise enact new legislation establishing exceptions to birthright citizenship for children born to foreign citizens unlawfully or temporarily in the country. But,” he noted, “Congress has not yet done so.”

Read together, the alignments define the road ahead. The constitutional holding commanded five votes. One member of the six-justice majority decided only the statutory question and identified the legislative path himself; three justices rejected the majority’s constitutional reading outright. Legislation of the kind Justice Kavanaugh described would remove the statutory ground on which his vote rested and would present the constitutional question to the Court directly — on a full legislative record, no longer refracted through an executive order’s defects.

The path after Barbara

NCI’s objective is unchanged; the route has changed, and we are candid about both.

Congressional action. We support federal legislation amending 8 U.S.C. § 1401 — the path Justice Kavanaugh’s concurrence expressly contemplated — to provide that a child born in the United States acquires citizenship at birth when at least one parent is a citizen, a national, a lawful permanent resident, or otherwise lawfully present with settled ties. We are equally candid about what such a statute is for: as Barbara stands, its restrictive provisions would conflict with the constitutional holding and would be challenged immediately. Its purpose is to present the question squarely and to ask the Court to confine or reconsider Barbara’s constitutional ruling.
A constitutional amendment as the durable resolution. If the Court adheres to Barbara, the original understanding we defend can be restored only by amendment. That is a long road, and we say so; institutions built to last can walk it.
The long-term case for reconsideration. Constitutional rulings are revisited when scholarship, litigation, and public argument sustain the case that they were wrongly decided. This paper is an installment in that work.

We continue to oppose pursuing this by executive action — a position Barbara vindicated. The 2025 order was enjoined by every court to review it and then struck down; it produced no lasting reform and hardened the adverse precedent. Reform that lasts must be written into law.

Counterarguments

We take the opposing case seriously; it is now the law.

The Supreme Court has decided the question. Trump v. Barbara (2026) reaffirmed Wong Kim Ark broadly and rejected the allegiance-limited reading. Critics will say that under stare decisis the debate is over, and that legislation designed to test the holding disrespects the Court.
The majority reading of the text. Most courts and scholars read “subject to the jurisdiction” to mean subject to U.S. law — which people who are unlawfully or temporarily present plainly are (they can be arrested, taxed, and sued). On this view the only historical exceptions are diplomats, hostile occupiers, and (formerly) tribal members, and the clause reaches essentially everyone else born on the soil.
Anachronism. There was no federal category of “unlawful presence” in 1866 — the first significant federal entry restrictions came in 1875 and 1882 — so, critics argue, the drafters cannot have meant to exclude a class that did not yet exist. Senator Conness of California, moreover, said on the floor that the children of Chinese parents — who at the time could not themselves naturalize — would be citizens under the clause.
Howard’s statement, read differently. Many read Senator Howard’s sentence — including its closing phrase, “but will include every other class of persons” — as excluding only the families of diplomats and sweeping in everyone else born on U.S. soil, not as a broad exclusion of the children of aliens generally.
Wong Kim Ark, read broadly. The opinion contains sweeping language about the common-law rule of jus soli that many read as settling the question for all children born on U.S. soil, whatever their parents’ status.
Practical and humanitarian concerns. Narrowing birthright citizenship could create a class of stateless people, impose documentation burdens (parents proving status at every birth), and unsettle longstanding reliance.
Feasibility. A constitutional amendment requires two-thirds of Congress and three-quarters of the states; after Barbara, a statute faces not merely a “serious challenge” but a square constitutional holding. Reform is legally and politically hard.

NCI’s response, offered as our judgment rather than as settled law: the allegiance-based reading remains the better account of the original understanding, and Barbara — like other constitutional rulings we believe were wrongly decided — is a legitimate subject of sustained contest through lawful channels: scholarship, legislation that presents the question, and the amendment process. Asking the Court to reconsider a decision through candid argument is not defiance of the law; it is how constitutional error has always been corrected. On anachronism: the clause states a principle — allegiance-owing membership — and principles apply to categories that arise later. Senator Conness spoke without qualification about the children of Chinese parents, and we do not read a residence or lawfulness qualifier into his words; our point is narrower — no category of unlawful presence existed in 1866, so his statement cannot tell us how the principle applies to one. On the humanitarian concerns, we support reforms drafted to avoid statelessness and to protect settled, lawful residents.

Sources

U.S. Const. amend. XIV, § 1 (Citizenship Clause).
Civil Rights Act of 1866, 14 Stat. 27.
Cong. Globe, 39th Cong., 1st Sess. 2890 (1866) (Sen. Howard, introducing the clause); id. at 2890–91 (Sen. Conness); id. at 2893 (Sen. Trumbull, on “complete jurisdiction”).
Elk v. Wilkins, 112 U.S. 94 (1884).
United States v. Wong Kim Ark, 169 U.S. 649 (1898).
Slaughter-House Cases, 83 U.S. 36 (1873) (dictum on the clause’s exclusions).
Indian Citizenship Act of 1924, 43 Stat. 253.
8 U.S.C. § 1401(a) (statutory citizenship at birth).
Trump v. Barbara, slip op. (U.S. June 30, 2026); id. (Kavanaugh, J., concurring in the judgment).
Trump v. CASA, Inc., 606 U.S. ___ (2025) (limiting universal injunctions).

Primary texts and full opinions are collected in the Research Library.

Cite this paper

National Citizenship Institute. "Birthright Citizenship and the Jurisdiction Requirement." July 2026. https://nationalcitizenship.org/research/birthright-citizenship.