Trump v. CASA, Inc.

Fourteenth Amendment Interpretation, Executive Power, and Immigration Policy

Abstract

In Trump v. CASA, Inc. 606 U.S. 831 (2025), the Supreme Court of the United States held, by a 6–3 majority, that universal (nationwide) injunctions likely exceed the equitable authority granted to federal courts under the Judiciary Act of 1789. Delivered by Justice Barrett, the opinion addressed emergency applications for partial stays of preliminary injunctions blocking President Trump’s Executive Order No. 14160, which sought to deny birthright citizenship under the Fourteenth Amendment’s Citizenship Clause to certain children born in the United States. The Court expressly declined to reach the merits of the Executive Order’s constitutionality, limiting its holding to remedial scope. This case note examines the majority’s historical inquiry into traditional equitable remedies, its rejection of universal relief as lacking founding-era pedigree, and the synergistic tension between judicial power and executive authority in immigration policy. It analyses the three concurring opinions and the two powerful dissenting opinions, which condemned the decision as an abdication of the judiciary’s role in enforcing constitutional limits on the Executive. The note critically evaluates the doctrinal legitimacy of curbing universal injunctions, contrasts it with the complete-relief principle and class-action alternatives, and situates the ruling within broader debates on nationwide injunctions, separation of powers, and the Citizenship Clause. Finally, it assesses the decision’s legacy in light of subsequent class-action litigation and the pending merits review of birthright citizenship, concluding that while the holding restores historical limits on judicial remedies, it risks fragmenting constitutional protections in immigration enforcement and underscores the fragility of executive reinterpretations of the Fourteenth Amendment.