Trump v. CASA, Inc.
The Supreme Court ruled that federal courts cannot issue 'universal injunctions' — orders that bar the government from enforcing a policy against everyone in the country — because such sweeping relief has no basis in the historical practice of courts of equity at the nation's founding.
The decision narrows three nationwide orders that had blocked President Trump's birthright citizenship executive order, while deliberately leaving for another day the larger question of whether stripping citizenship from certain children born in the United States is constitutional at all.
How it got here: Three district courts issued universal preliminary injunctions; three courts of appeals denied stays; the government filed emergency applications asking the Supreme Court to narrow the injunctions to cover only the actual plaintiffs.
The Case in Depth
What happened
President Trump signed an executive order declaring that children born in the US to mothers who are unlawfully present (or present only temporarily) and fathers who are not citizens or permanent residents would not be recognized as US citizens. Individuals, immigrant-rights organizations, and more than twenty states sued, arguing the order violates the Fourteenth Amendment's Citizenship Clause and a federal statute. Three federal district courts issued nationwide injunctions blocking the order from taking effect against anyone.
The question before the Court
Do federal courts have the power to issue injunctions blocking the government from enforcing a policy against everyone in the country, not just the people who filed the lawsuit?
The Court's answer
No — the Court ruled that federal courts cannot issue "universal injunctions," orders that block the government from enforcing a policy against everyone in the country. The Judiciary Act of 1789 grants federal courts authority over equity cases, but only for remedies that existed in English courts at the nation's founding. No such sweeping injunction existed then; courts at the founding issued relief only for the specific parties before them.
Because the government was likely to succeed on this point, and because courts that exceed their authority cause irreparable harm to the government's ability to act, the Court partially stayed the three nationwide injunctions, limiting them to protect only the actual plaintiffs in each case. The question of whether the birthright citizenship executive order itself is constitutional was not addressed and remains open.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Anyone not already a named plaintiff in one of these lawsuits loses the protection of these court orders. People challenging future federal laws or executive actions will need to file class-action suits under strict procedural rules, or file their own individual lawsuits, rather than relying on a single district court order to shield the entire country. The practical hurdle of getting broad protection just became significantly higher.
What changes now
The three injunctions are sent back to the lower courts to be rewritten to protect only the actual plaintiffs in each case. Section 2 of the executive order will not take effect for 30 days from the June 27, 2025 decision. The constitutional question — whether the birthright citizenship order violates the Fourteenth Amendment or federal statute — continues litigating in the lower courts, and the Solicitor General committed at oral argument to seeking Supreme Court review once a circuit court rules.
What this does not decide
The Court expressly did not decide whether the birthright citizenship executive order violates the Fourteenth Amendment's Citizenship Clause or the Nationality Act of 1940 — that question remains open in the lower courts. The ruling also does not address whether the Administrative Procedure Act separately authorizes courts to vacate (rather than enjoin) federal agency action.
Concurrences and dissents
How the Justices voted
Majority (6). Justice Barrett (author), joined by Justice Roberts, Justice Thomas, Justice Alito, Justice Gorsuch, and Justice Kavanaugh.
Dissent (3). Justice Sotomayor (author), joined by Justice Kagan and Justice Jackson.
Concurrence — Justice Thomas
Justice Thomas agreed that universal injunctions are impermissible and joined the majority fully. He wrote separately to warn that courts must treat the 'complete relief' principle as a ceiling on remedies, not a mandate to provide the broadest possible relief. He cautioned that courts err when they treat complete relief as an entitlement — in some cases, traditional equitable limits will require plaintiffs and courts to make do with less than full remediation. Lower courts, he urged, should carefully cabin injunctive relief within historical equitable bounds.
Concurrence — Justice Alito
Justice Alito joined the majority but flagged two unresolved issues that could undermine the decision in practice. First, states may still obtain broad injunctive relief by asserting third-party standing on behalf of their residents — a practice he urged courts to scrutinize rigorously. Second, district courts could replicate universal injunctions through permissively certified nationwide class actions. He warned that lax enforcement of class-certification requirements under Rule 23 could let the universal injunction 'return from the grave' under a different label.
Concurrence — Justice Kavanaugh
Justice Kavanaugh joined the majority and wrote separately to situate the ruling in broader context. He argued that when major federal statutes or executive orders are challenged, there is often a real need for a nationally uniform answer about whether they can be enforced during the years before a final ruling — and that the Supreme Court itself, not district courts, is the right institution to provide that uniformity. He predicted a flood of stay applications to the Court and emphasized that resolving them is a core part of the Court's job, not a distraction.
Dissent — Justice Sotomayor
“No right is safe in the new legal regime the Court creates. Today, the threat is to birthright citizenship.”The dissent's opening warning about the broader consequences of eliminating universal injunctions.
Justice Sotomayor argued that the birthright citizenship executive order is patently unconstitutional under settled law, meaning the government suffered no cognizable irreparable harm from being universally enjoined. She contended that universal injunctions have deep historical roots in equity — through bills of peace and taxpayer suits — and that the majority froze equity at the founding rather than recognizing its inherent adaptability. She also argued that even under the majority's own framework, the lower courts correctly found that only nationwide injunctions could completely remedy the States' financial and administrative injuries.
Dissent — Justice Jackson
Justice Jackson agreed with Justice Sotomayor and wrote separately to argue that the ruling poses a fundamental threat to the rule of law. In her view, the core function of federal courts is to order everyone — including the Executive — to comply with the Constitution, not merely to provide party-specific relief. Banning universal injunctions, she argued, creates a 'zone of lawlessness' in which the Executive may violate constitutional rights of anyone who has not yet filed a personal lawsuit, subverting the constitutional separation of powers and disproportionately harming those without legal resources. Read the full dissent →
How the Court got there
The legal reasoning, step by step
- The Court applied the standard four-factor test for emergency stays from Nken v. Holder: the applicant must show a strong likelihood of success on the legal question at issue, a likelihood of irreparable harm absent relief, that the balance of equities tips in its favor, and that the public interest supports the stay. Notably, the Court applied this test to the narrow threshold issue of injunction scope, not to the merits of the executive order itself.
- Federal courts' equitable power comes entirely from the Judiciary Act of 1789, which grants jurisdiction over 'all suits in equity.' Under Grupo Mexicano de Desarrollo (a 1999 precedent setting the governing test), that statutory grant covers only remedies 'traditionally accorded by courts of equity' at the nation's founding — courts must ask whether a modern remedy has a meaningful founding-era historical analogue.
- Universal injunctions — orders barring the government from enforcing a law against anyone, everywhere — had no historical equivalent in English courts of equity. The traditional rule was strictly party-specific: an injunction could only bind parties to the lawsuit, as the old maxim put it, 'you cannot have an injunction except against a party to the suit.' Early American courts followed the same approach, and the Court's own 19th-century precedents consistently rejected relief extending beyond the parties.
- Universal injunctions were essentially nonexistent until the mid-20th century. The first recognizable example appeared in 1963, and they remained rare until the late 20th century. The Court found this near-total absence across the nation's first 175 years decisive: if federal courts had possessed this power, they would have used it, especially during periods of intense constitutional litigation.
- Respondents' proposed historical analogues did not hold up. 'Bills of peace' — a form of group litigation in English equity courts — involved small, cohesive groups and bound absent members to the decree; their modern descendant is the class action under Federal Rule of Civil Procedure 23, not the universal injunction. The 'complete relief' principle allows courts to provide full relief to the parties before them, not to the world at large; blocking enforcement of the order against a pregnant plaintiff's child fully remedies that plaintiff's injury without extending to strangers to the suit.
- Because universal injunctions exceed the Judiciary Act's grant, the government demonstrated both a strong likelihood of success and irreparable harm from courts improperly intruding on a coordinate branch of government. The balance of equities favored partial stays because the actual plaintiffs would remain fully protected by narrower, party-specific injunctions — they lose nothing of substance from the limitation.
Doctrinal impact
Cases affected by this decision
Reaffirms Grupo Mexicano de Desarrollo, S. A. v. Alliance Bond Fund, Inc. (527 U.S. 308)
Reaffirmed as the governing test: federal courts' equitable authority extends only to remedies with a founding-era historical analogue.