Federal jurisdiction can disappear even after years of litigation, extensive discovery, and, in some cases, a completed trial. The U.S. Supreme Court underscored that reality in Hain Celestial Group, Inc. v. Palmquist, 607 U.S. 421 (2026), and Royal Canin U.S.A., Inc. v. Wullschleger, 604 U.S. 22 (2025). Although the cases involved different jurisdictional theories (diversity jurisdiction in one and federal-question jurisdiction in the other), the Court reached the same conclusion: concerns of efficiency, finality, and judicial economy cannot justify retaining jurisdiction when the statutory requirements for federal jurisdiction are not met.
Hain Celestial: An Erroneous Dismissal Cannot Create Diversity Jurisdiction
Continue Reading Supreme Court Reaffirms Strict Limits of Federal Jurisdiction in Removed Cases

