Owen Equipment & Erection Co. v. Kroger

In an action in which federal jurisdiction is based on diversity of citizenship, may the plaintiff assert a claim against a third-party defendant when there is no independent basis for federal jurisdiction over that claim? The Court of Appeals for the Eighth Circuit held in this case that such a claim is within the ancillary jurisdiction of the federal courts. We granted certiorari, 434 U.S. 1008, because this decision conflicts with several recent decisions of other Courts of Appeals.