The Supreme Court ruled 6-3 in Trump v. CASA, Inc. that federal district courts lack authority under the Judiciary Act of 1789 to issue universal (or nationwide) injunctions. Justice Barrett wrote the Court’s opinion, joined by Chief Justice Roberts and Justices Thomas, Alito, and Kavanaugh. Justices Thomas, Alito, and Kavanaugh filed separate concurrences. Justice Sotomayor dissented, joined by Justices Kagan and Jackson. Justice Jackson also authored a separate dissent.