Hain Celestial Group, Inc. v. Palmquist
The Supreme Court affirmed the Fifth Circuit's decision to vacate a federal judgment and remand a product liability case to state court because the District Court lacked diversity jurisdiction at the time of removal. The Court held that a district court's erroneous dismissal of a non-diverse defendant does not cure a pre-existing jurisdictional defect, as federal courts must assess jurisdiction based on the facts existing when the case was filed.