Caterpillar Inc. v. Lewis

Background

James David Lewis, a Kentucky resident, sued after a bulldozer accident, naming the bulldozer maker (a Delaware company) and the local service company (a Kentucky business). Liberty Mutual, the employer’s insurer from Massachusetts, later joined to assert a subrogation claim. After Lewis settled with the Kentucky service company, the manufacturer removed the case from state court to federal court based on diversity of citizenship. Lewis moved quickly to send the case back to state court, but the federal judge denied that motion. Before trial, the insurer settled with the Kentucky company and that defendant was dismissed; the federal trial then resulted in a verdict for the manufacturer.

Reasoning

The Court addressed whether a lack of complete diversity at the time a case is moved to federal court automatically destroys any later federal judgment. The Justices held that a district court’s error in refusing to remand an improperly removed case does not necessarily invalidate a final federal judgment if the parties satisfied federal diversity requirements by the time judgment was entered. The opinion relied on prior decisions and stressed practical concerns—finality, efficiency, and avoiding needless re‑litigation—while noting that if a jurisdictional defect remains at judgment, the federal judgment must be vacated.

Real world impact

The ruling means federal judgments will generally stand when removal was flawed but the case became properly removable and was tried and decided in federal court. Plaintiffs who timely object to removal preserve the objection, and district judges still must enforce removal rules and remand if jurisdiction is absent at judgment. The Court reversed the appeals court and sent the case back for further proceedings consistent with this rule.