President Donald Trump signed an executive order on January 20, 2025, directing federal agencies to cease recognizing birthright citizenship for children born on U.S. soil to parents who are neither citizens nor lawful permanent residents — a direct challenge to a constitutional interpretation that has governed U.S. nationality law for over a century.

The order immediately drew legal challenges, and the case has now reached the Supreme Court. At its core is a question the Court last addressed substantively in United States v. Wong Kim Ark (1898): whether the Fourteenth Amendment's Citizenship Clause — "All persons born or naturalized in the United States, and subject to the jurisdiction thereof" — extends to children born on U.S. soil regardless of their parents' immigration status.

Wong Kim Ark is unambiguous on its face. The Court held that a child born in San Francisco to Chinese nationals who were themselves barred from naturalization under the Chinese Exclusion Act was nonetheless a U.S. citizen by birth. The majority grounded that ruling in English common law's jus soli tradition and the plain text of the Fourteenth Amendment, ratified in 1868 partly to repudiate the Dred Scott decision's exclusion of Black Americans from citizenship. That 1898 precedent has functioned as settled law for more than 125 years — no subsequent administration attempted to unwind it by executive action until now.

The legal theory behind Trump's order rests on a narrower reading of "subject to the jurisdiction thereof." Proponents argue the phrase was intended to exclude not only foreign diplomats and enemy combatants — the universally accepted carve-outs — but also any person present in the country without legal authorization, and by extension their U.S.-born children. That reading has been advanced in academic literature, most prominently by scholars associated with the Claremont Institute, but it has never commanded a Supreme Court majority.

What makes the current case procedurally significant is how the Court frames its review. Lower federal courts moved swiftly to enjoin the executive order, and the government's emergency applications to the Court raised not only the merits but also the separate question of whether district courts may issue nationwide injunctions blocking executive policy across all fifty states. The Court's willingness to address that scope-of-relief question alongside the citizenship merits means the ruling could reshape how federal courts constrain executive action well beyond this particular dispute.

The stakes in citizenship terms are substantial. The United States and Canada are among the few developed nations that retain unrestricted birthright citizenship. Narrowing the Fourteenth Amendment's application would affect not only future births but would generate immediate questions about the status of the estimated hundreds of thousands of U.S.-born children of undocumented parents currently living as citizens. No administrative mechanism exists to retroactively strip citizenship at scale; any attempt would trigger its own wave of litigation under the Fifth Amendment's Due Process Clause and potentially international human rights frameworks.

The broader constitutional tension here is worth naming plainly. The executive order does not merely test immigration policy — it tests whether a president can reinterpret a self-executing constitutional provision through administrative fiat. The Fourteenth Amendment confers citizenship by operation of the Constitution itself, not by statute, which means Congress cannot simply legislate a different outcome either. Any durable change would require either a Supreme Court ruling departing from Wong Kim Ark or a constitutional amendment requiring ratification by three-quarters of the states — a threshold no modern amendment has cleared in decades.

How the current Court approaches stare decisis here will be closely watched. The Roberts Court has shown willingness to overturn long-standing precedent — Dobbs v. Jackson Women's Health Organization (2022) being the clearest recent example — but the justices have also signaled in various contexts that reliance interests and the depth of a precedent's roots in constitutional text carry independent weight. Wong Kim Ark is older, more textually anchored, and more deeply embedded in administrative practice than Roe v. Wade was when Dobbs arrived. That asymmetry does not predetermine the outcome, but it shapes the doctrinal terrain the Court must navigate.

A decision is expected before the Court's term closes.