Trump v. CASA: the Supreme Court limits "universal injunctions" and leaves birthright citizenship for another dayTrump v. CASA, Inc., 606 U.S. 831 (2025)

Wang Law Firm, LLC · David Wang, Managing Attorney · Attorney-reviewed · Updated October 2026

Case at a glance

Background: what is a "universal injunction"?

When a party believes a federal government policy is unlawful, it can ask a federal court for an injunction barring the government from enforcing the policy. Traditionally, an injunction protects the parties to the lawsuit. But over the past two decades or so, federal district courts increasingly issued "universal injunctions" (often also called "nationwide injunctions") barring the government from enforcing a policy against anyone, not just the plaintiffs.

Such injunctions have been especially common in immigration: a single ruling by one district judge could pause a national immigration policy across the country. Administrations of both parties have criticized the practice, and scholars have debated it for years.

On January 20, 2025, the President signed Executive Order 14160 ("Protecting the Meaning and Value of American Citizenship"), directing federal agencies to stop recognizing as U.S. citizens children born in the United States after February 19, 2025 whose mother was unlawfully or temporarily present (for example, on a tourist, student or work visa) and whose father was not a U.S. citizen or green card holder. Federal district courts in Maryland, Washington (Western District) and Massachusetts each issued universal injunctions, and the Fourth, Ninth and First Circuits all declined to stay them.

Facts

The government filed three emergency applications with the Supreme Court. It did not ask the Court to hold the order constitutional; it asked only that the lower-court injunctions be narrowed to protect the plaintiffs in each case (individual plaintiffs, membership organizations and the plaintiff states), so the order could be enforced against everyone else. In an unusual step, the Court heard oral argument on the emergency applications.

The plaintiffs in the three cases included the Maryland immigrant-rights organization CASA and other organizations, along with several pregnant women; Washington and other states and individuals; and New Jersey and more than a dozen other states, plus several cities.

Issues

• Do federal district courts have authority to issue universal injunctions that protect people beyond the plaintiffs?
• If not, what scope of injunction is enough to give each plaintiff (especially the plaintiff states) "complete relief"?

Whether the order violates the Fourteenth Amendment and 8 U.S.C. 1401 was not at issue in this case.

What the Court held

Majority: universal injunctions likely exceed statutory authority

Justice Barrett's majority opinion reasoned that federal courts' equitable power comes from the Judiciary Act of 1789 and is limited to the relief traditionally available from the English Court of Chancery at the founding. Traditional equitable relief ran to the parties, and universal injunctions have no sufficient historical analogue. The Court concluded: "Universal injunctions likely exceed the equitable authority that Congress has given to federal courts."

The majority also explained:

• Courts may give plaintiffs "complete relief." If only an injunction covering nonparties would give a plaintiff complete relief, the incidental benefit to others is not unlawful.
• Universal injunctions bypass the procedural safeguards that Federal Rule of Civil Procedure 23 sets for class actions; protecting large numbers of nonparties should go through the class-action process.
• For the plaintiff states, the scope of "complete relief" is more complicated (for example, children moving between states, and how state benefits systems verify citizenship), and the lower courts should decide whether narrower injunctions are appropriate.
• In a footnote, the Court made clear that it was not addressing the separate question whether the Administrative Procedure Act (APA) authorizes federal courts to vacate federal agency action.

The Court therefore partially stayed the three injunctions to the extent they were broader than necessary to give the plaintiffs complete relief, and provided that Section 2 of the order could not take effect until 30 days after the decision.

No ruling on the order itself

The majority made clear that the case concerned only the scope of relief; the government had not asked the Court to decide whether the order violates the Citizenship Clause or the Nationality Act, and the Court did not decide that question.

Concurrences and dissents

• Justice Kavanaugh's concurrence noted that plaintiffs may still seek broader relief through class actions, vacatur under the APA and other routes, and stressed that on the interim question of whether major federal statutes and executive actions may be enforced while litigation proceeds, the Supreme Court will often still be the ultimate decision-maker.
• Justice Alito (joined by Justice Thomas) cautioned lower courts against letting universal injunctions return "under another name" through lax class certification or third-party standing for states.
• Justice Sotomayor (joined by Justices Kagan and Jackson) argued in dissent that the order is plainly unconstitutional and that the majority, by allowing the government to enforce a plainly unconstitutional policy against non-plaintiffs, weakened the courts' ability to protect constitutional rights. Justice Jackson wrote a separate dissent arguing that limiting universal injunctions lets the executive act unlawfully toward people who are not parties to a lawsuit.

What it means for applicants

• For families having children in the United States: The case itself did not change birthright citizenship. After CASA, Executive Order 14160 was blocked by injunctions in nationwide class actions and, according to public reports, was never actually enforced; on June 30, 2026, the Supreme Court held the order invalid in Barbara.
• For lawsuits challenging federal immigration policy: After CASA, the approach of "asking one judge to halt a national policy" is limited. Nationwide relief now comes mainly through three routes: court-certified nationwide class actions (Rule 23); states as plaintiffs seeking broader injunctions on the ground of "complete relief"; and requests under the APA to vacate a federal agency's rule or policy or to postpone its effective date.
• For individuals: When a policy is "halted by a court," look closely at which court, what form of relief, and who is covered. If only the plaintiffs or an organization's members are protected, non-plaintiffs may still be bound by the policy.

Later developments

1. Class actions followed quickly: On the day of the decision, the CASA plaintiffs moved for class certification, and the American Civil Liberties Union (ACLU) and others filed the Barbara v. Trump class action in the U.S. District Court for the District of New Hampshire. On July 10, 2025, the New Hampshire court provisionally certified a nationwide class of children and issued a preliminary injunction; on August 7, 2025, the Maryland court also certified a modified nationwide class and barred enforcement of the order against class members.
2. State suits: In Washington v. Trump (No. 25-807), decided July 23, 2025, the Ninth Circuit held the order unconstitutional and upheld a nationwide injunction as necessary to give the plaintiff states complete relief; the government's petition for certiorari (No. 25-364) was denied on June 30, 2026. The First Circuit also upheld the injunction in the case brought by New Jersey and other states.
3. The constitutional question returned to the Supreme Court: On December 5, 2025, the Supreme Court granted certiorari before judgment in Barbara; on June 30, 2026, it upheld the injunction 6–3, holding that children born in the United States to parents unlawfully or temporarily present are citizens at birth. See Trump v. Barbara explained.
4. Other immigration litigation: After CASA, several immigration cases have used class-wide injunctions or APA vacatur or postponement — for example, in June 2026 the U.S. District Court for the District of Rhode Island vacated a USCIS policy pausing adjudication of cases for applicants of certain nationalities, and in September 2026 the U.S. District Court for the District of Massachusetts used APA section 705 to postpone the rule eliminating "duration of status" (D/S) for students, expressly rejecting the argument that "CASA limits relief to the parties." The Supreme Court has not yet answered whether APA vacatur is also limited by CASA. For the current status of each case, see the immigration litigation tracker.

Practical tips

• When you see news that "a court has halted an immigration policy," first check: which court, whether it is a preliminary injunction or a final judgment, whether a class was certified, whether it has been appealed or stayed, and who is covered.
• If you may be a member of a class in a class action, review the class definition certified by the court or ask an attorney; class members generally do not need to sue on their own.
• When the scope of relief is uncertain, do not plan travel, file applications or give up status based on headlines alone; consult an attorney first.

Frequently asked questions

Opinion text and sources

• Trump v. CASA, Inc. opinion (supremecourt.gov)
• Trump v. CASA, Inc. (Justia)
• Executive Order 14160 (Federal Register)
• Trump v. Barbara docket (No. 25-365)
• Barbara v. Trump: D.N.H. preliminary injunction and provisional class certification of July 10, 2025 (Civil Rights Litigation Clearinghouse)

Related reading

• Trump v. Barbara (2026): birthright citizenship executive order held invalid
• United States v. Wong Kim Ark (1898): the foundational birthright citizenship case
• Immigration litigation tracker (as of October 9, 2026)
• Loper Bright explained

This page is a general introduction to a court decision and is not legal advice. The law and case law change, and outcomes depend on the specific facts. To evaluate your situation, consult an attorney.