 Caterpillar asked the Supreme Court to review the case, stressing that at the time judgment was entered, the jurisdictional defect that had existed at the beginning had been cured.The Supreme Court agreed to hear the case.Article III allows federal courts to hear disputes between citizens of different states, but the Court has long interpreted the enabling statute whereby Congress exercised the right to confer this power as requiring that there be "complete diversity" of citizenship before federal courts may hear cases predicated on diversity jurisdiction.