Today, the Supreme Court of the United States heard oral arguments in Trump v. Barbara — the case that will determine whether President Trump’s executive order limiting birthright citizenship is constitutional.
The ruling will not come today. The court is expected to issue its decision by June or July 2026. But oral arguments give critical insight into how the justices are thinking — and today’s session was revealing.
What the Administration Argued
Solicitor General D. John Sauer argued on behalf of the Trump administration that the 14th Amendment’s phrase “subject to the jurisdiction thereof” does not extend to children born to parents who are in the United States illegally or on temporary visas.
Sauer’s core argument: citizenship requires a complete allegiance to the United States. Those who entered the country illegally, or who are here temporarily with no permanent commitment to American life, do not possess that allegiance. Their children, born here by circumstance rather than by right of permanent belonging, should not automatically inherit citizenship.
Sauer also pointed to the practice of other developed nations — most of which have moved away from unconditional birthright citizenship — as evidence that the American interpretation is an outlier, not a constitutional mandate.
What the Challengers Argued
The ACLU and state attorneys general defending the current interpretation argued that the administration is asking the court to overturn 125 years of settled constitutional law built on the Wong Kim Ark precedent.
Their argument: the 14th Amendment’s text is clear, its history is clear, and the Supreme Court has already settled the question. Overturning Wong Kim Ark would create chaos — 4.8 million children would begin life without citizenship over the next two decades, according to the Migration Policy Institute. Every system used to prove citizenship in America — birth certificates, Social Security numbers, passports — is built on the assumption that birth on American soil is sufficient.
What the Justices Signaled
Justice Brett Kavanaugh pressed hard on implementation — the same questions he raised in last year’s preliminary hearing. How would hospitals process newborns? How would citizenship be determined at birth if a birth certificate is no longer sufficient? The administration’s answers remained vague, which appeared to frustrate several justices across the ideological spectrum.
The court’s conservative justices — Roberts, Thomas, Alito, Gorsuch, Kavanaugh, and Barrett — showed varying levels of skepticism toward both sides. Thomas and Alito appeared most sympathetic to the administration’s textual argument. Roberts and Kavanaugh pressed hardest on the practical consequences and the strength of the Wong Kim Ark precedent.
The liberal justices — Sotomayor, Kagan, and Jackson — were sharply critical of the administration’s position, arguing that reinterpreting “subject to the jurisdiction” in the way the administration proposes would require the court to ignore both the original intent of the amendment and 125 years of settled law.
What Conservatives Should Be Watching
The most likely outcome, based on today’s arguments, is a decision that does not produce a clean 6-3 ruling along ideological lines. Roberts and Kavanaugh appear to be the key votes — and both showed genuine concern about the implementation challenges and the weight of Wong Kim Ark as precedent.
A ruling upholding the executive order would be historic — one of the most significant reinterpretations of the 14th Amendment since it was ratified. A ruling striking it down would leave the constitutional question settled but would not foreclose future congressional action.
Either way, the administration has forced a long-overdue constitutional reckoning. The question of who belongs to America — who is entitled to its citizenship, its protections, and its privileges — deserves serious legal scrutiny. Today, it got it.
The ruling comes this summer. Watch this space.