William J. Brennan, Jr.

Summary

William J. Brennan, Jr. United Mine Workers of America v…

The state and federal claims must derive from a common nucleus of operative fact. But if, considered without regard to their federal or state character, a plaintiff's claims are such that he would ordinarily be expected to try them all in one judicial proceeding, then, assuming substantiality of the federal issues, there is power in federal courts to hear the whole. [13]
That power need not be exercised in every case in which it is found to exist. It has consistently been recognized that pendent jurisdiction is a doctrine of discretion, not of plaintiff's right.
Source: Wikisource

William J. Brennan, Jr. United Mine Workers of America v…

The mere multiplication of grounds of negligence alleged as causing the same injury does not result in multiplying the causes of action. 'The facts are merely the means, and not the end. They do not constitute the cause of action, but they show its existence by making the wrong appear." Id., at 321, 47 S.Ct. at 602.
Had the Court found a jurisdictional bar to reaching the state claim in Hurn, we assume that the doctrine of res judicata would not have been applicable in any subsequent state suit.
Source: Wikisource

William J. Brennan, Jr. United Mine Workers of America v…

Preliminarily, we note that it would be inconsistent with the fabric of national labor policy to infer ratification from the mere fact that petitioner involved itself in the dispute after the violence had occurred, or from the fact that it carried on some normal union functions, such as provision of strike relief. A union would ordinarily undertake these tasks during the course of a lawful strike. National labor policy requires that national unions be encouraged to exercise a restraining influence on explosive strike situations
Source: Wikisource

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