Supplemental jurisdiction

Supplemental jurisdiction, also sometimes known as ancillary jurisdiction or pendent jurisdiction, is the authority of United States federal courts to hear additional claims substantially related to the original claim even though the court would lack the subject-matter jurisdiction to hear the additional claims independently. 28 U.S.C. § 1367 is a codification of the Supreme Court's rulings on ancillary jurisdiction and pendent jurisdiction and a superseding of the Court's treatment of pendent party jurisdiction.

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