Yeazell, pp. 244-251: Supplemental Jurisdiction
The prior two jurisdictional concepts we went over, diversity jurisdiction and federal question jurisdiction, tend to narrow the caseload of the federal courts. This one tends to broaden it somewhat. In 1990, we got 28 U.S.C. § 1367 which codified stuff that had previously just been judge-made law. Luckily for us, things are much simpler now than before 1990, because there used to be two branches of supplemental jurisdiction: (1) pendant jurisdiction and (2) ancillary jurisdiction.