What types of claims can supplemental jurisdiction cover?

Supplemental jurisdiction is a legal concept that allows a federal court to hear additional claims that are related to an original claim that the court has jurisdiction over. These additional claims must be sufficiently related to the primary claim, making them ancillary.

In this context, when discussing claims that can be covered under supplemental jurisdiction, those that are ancillary to the original claims stand out because they arise from the same nucleus of operative fact. This means that they share a substantial connection to the primary claim, allowing the court to adjudicate them without violating principles of judicial efficiency or fairness.

Claims solely based on federal law cannot be part of supplemental jurisdiction if they stand alone, as they would be addressed through original jurisdiction. Claims that only involve state parties do not typically qualify under supplemental jurisdiction unless they are tied to a federal claim that is already present. Lastly, unrelated claims would not meet the requirement for supplemental jurisdiction, as there needs to be a connection to the original claims for a court to have the authority to hear them. Thus, the focus on ancillary claims captures the essence of how supplemental jurisdiction is intended to function within the legal system.