The Supreme Court will hear oral arguments on April 1 in Trump v. Barbara, the case that will almost certainly determine whether President Trump's executive order redefining birthright citizenship passes constitutional muster. A decision is expected by late June.
Nearly 15 months after President Trump signed Executive Order No. 14,160 on his first day back in office, the legal battle over its meaning has finally reached the merits stage. No more procedural detours. No more jurisdictional sideshows. The Court will confront the question head-on: Does the Fourteenth Amendment guarantee automatic citizenship to every child born on American soil, regardless of whether their parents are here legally?
The answer will reshape American immigration law for a generation.
The executive order, titled "Protecting the Meaning and Value of American Citizenship," targets two specific categories. First, children born to mothers who are illegally present in the United States when the father is not a citizen or lawful permanent resident. Second, children born to mothers whose presence is "lawful but temporary," such as those on tourist or student visas, when the father likewise holds no permanent status, as National Constitution Center reports.
The legal resistance was almost instantaneous. On Jan. 21, 2025, one day after the order was signed, Washington state and three other states hauled the administration into court. A district court issued a temporary universal injunction blocking the order, and the U.S. Court of Appeals for the Ninth Circuit upheld it. That sequence surprised no one.
In Trump v. CASA (2025), a divided Supreme Court stepped in but only to rule that the district court lacked the authority to issue a universal injunction. It declined to address the underlying constitutional question. On the same day, a group of individuals, led by a plaintiff under the pseudonym "Barbara," sued the federal government in the U.S. District Court for the District of New Hampshire. That court approved a class of potentially affected individuals and issued its own injunction.
The Trump administration submitted a petition for a writ of certiorari on Sept. 26, 2025. The justices granted it on Dec. 5, agreeing to decide "whether the Executive Order complies on its face with the Citizenship Clause and with 8 U.S.C. 1401(a), which codifies that Clause."
That is as clean a question as the Court could have framed. And it is long overdue.
The Citizenship Clause reads:
"All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside."
For decades, the phrase "subject to the jurisdiction thereof" has been treated as a formality, a constitutional afterthought with no independent force. The prevailing assumption, hardened by repetition rather than rigorous analysis, has been that physical birth on U.S. soil is the only requirement. The executive order challenges that assumption directly.
The amendment was ratified in the aftermath of Dred Scott v. Sandford (1857), the decision that held Black Americans had "no rights which the white man was bound to respect." The Citizenship Clause was designed to guarantee that formerly enslaved people and their children would never again be denied membership in the political community. That purpose is beyond dispute.
What is very much in dispute is whether the framers of that clause intended it to confer citizenship on the children of people who entered the country in violation of its laws, or who are present only temporarily and owe no lasting allegiance to the United States.
United States Solicitor D. John Sauer anchors the administration's argument in two Supreme Court precedents, both written by the same justice: Horace Gray.
The first is Elk v. Wilkins (1884). John Elk, a Winnebago Native American, was born on a reservation but moved to Omaha, where he was employed and paid taxes. He was not allowed to vote. On appeal, Elk cited Section 2 of the Fourteenth Amendment. Justice Gray, writing for the majority, ruled that Elk was:
"No more 'born in the United States and subject to the jurisdiction thereof,' within the meaning of the first section of the Fourteenth Amendment, than the children of subjects of any foreign government born within the domain of that government, or the children born within the United States of ambassadors or other public ministers of foreign nations."
Gray also wrote that the amendment was designed to place "beyond doubt that all persons, white or black, and whether formerly slaves or not, born or naturalized in the United States, and owing no allegiance to any alien power, should be citizens of the United States and of the state in which they reside."
That phrase, "owing no allegiance to any alien power," does significant work for the administration's position. Illegal immigrants and temporary visitors, by definition, retain allegiance to their home countries. Sauer argues that their children therefore "do not qualify" for citizenship "because their parents are not domiciled in, and thus do not owe the requisite allegiance to, the United States."
The second case is United States v. Wong Kim Ark (1898), which opponents of the executive order treat as dispositive. Wong Kim Ark was born in San Francisco to parents who were both Chinese citizens, and the Court held that he automatically became a United States citizen at birth. But Sauer reads Wong Kim Ark narrowly, characterizing it as establishing a "general rule of citizenship by birth in the territory for children of persons 'domiciled within the United States.'" Wong Kim Ark's parents were legal, long-term residents. They were domiciled. The case, the administration argues, does not extend to illegal immigrants or short-term visitors.
The American Civil Liberties Union, representing opponents of the order, takes the opposite reading. Their argument centers on Wong Kim Ark as a sweeping affirmation of common law jus soli, the principle that birth on the soil equals citizenship, full stop.
The ACLU contends:
"Wong Kim Ark's basic holding is that the Clause enshrines the preexisting common law of citizenship. Under the common law—including the dominant American decision of the era, Lynch v. Clarke, (N.Y. Ch. Ct. 1844)—the rule was citizenship by birth, regardless of parental nationality or immigration status. Domicile was irrelevant."
They further argue that "even temporary visitors are 'subject to the jurisdiction' of the United States," citing Justice Gray's reference to The Schooner Exchange v. McFaddon (1812).
Notice the sleight of hand. The ACLU collapses criminal jurisdiction, the power to arrest and prosecute someone on your soil, into political allegiance. Every person physically present in the United States is subject to its criminal laws. That has never been contested. The question is whether that kind of jurisdiction is the same as the jurisdiction contemplated by the framers of the Fourteenth Amendment when they wrote "subject to the jurisdiction thereof." Justice Gray himself, in Elk v. Wilkins, clearly distinguished between the two. His own rulings suggest the answer is no.
The legal debate is intricate, but the policy reality is simple. Under the current interpretation, any person who crosses the border illegally and gives birth on American soil produces an American citizen. That child then becomes an anchor for future chain migration claims. The incentive structure is obvious, and it has operated unchallenged for decades, not because the constitutional text demands it, but because no administration had the nerve to test the question.
This administration did.
The justices now face a choice between two readings of the same clause, written by the same justice, in two different cases decided 14 years apart. Elk v. Wilkins suggests "subject to the jurisdiction thereof" carries real substantive weight, excluding those who owe allegiance elsewhere. Wong Kim Ark is either a broad endorsement of birthright citizenship for everyone born on U.S. soil, or a narrower ruling limited to the children of domiciled legal residents.
The ACLU wants the Court to read Wong Kim Ark as broadly as possible and Elk v. Wilkins as narrowly as possible. The administration asks the Court to read them together, as a coherent body of law from the same jurist.
One approach requires ignoring half of Justice Gray's jurisprudence. The other requires taking all of it seriously.
By late June, we will know which path the Court chose.
