Judicial function

Definition and stakes

Peter Vivian Daniel,  Dred Scott v. Sandford — Separate Opinion (1857)

“ However late this objection has been made, or may be made, in any cause in an inferior or appellate court of the United States, it must be considered and decided before any court can move one farther step in the cause, as any movement is necessarily to exercise the jurisdiction. Jurisdiction is the power to hear and determine the subject matter in controversy between the parties to a suit, to adjudicate or exercise any judicial power over them. ”
Source: Wikisource

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