550 U.S. 544 (2007) Cited 266,697 times 365 Legal Analyses
Holding that a complaint's allegations should "contain sufficient factual matter, accepted as true, to 'state a claim to relief that is plausible on its face' "
571 U.S. 277 (2014) Cited 4,301 times 49 Legal Analyses
Holding that “the mere fact that [defendant's] conduct affected plaintiffs with connections to the forum State does not suffice to authorize jurisdiction.”
526 U.S. 574 (1999) Cited 4,159 times 12 Legal Analyses
Holding that, because "[t]hey keep the federal courts within the bounds the Constitution and Congress have prescribed," questions concerning subject matter jurisdiction "must be policed by the courts on their own initiative even at the highest level"
401 U.S. 37 (1971) Cited 16,710 times 14 Legal Analyses
Holding that it was improper for the district court in that case to enjoin a state prosecution against Younger, in light of "the national policy forbidding federal courts to stay or enjoin pending state court proceedings except under special circumstances"
326 U.S. 310 (1945) Cited 22,590 times 109 Legal Analyses
Holding that states may exercise personal jurisdiction over out-of-state defendants with "certain minimum contacts with [the forum] such that the maintenance of the suit does not offend ‘traditional notions of fair play and substantial justice’ " (quoting Milliken v. Meyer , 311 U.S. 457, 463, 61 S.Ct. 339, 85 L.Ed. 278 (1940) )
U.S. Const. amend. IV Cited 26,700 times 2 Legal Analyses
Recognizing that "[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized"
U.S. Const. art. I, § 8 Cited 6,973 times 28 Legal Analyses
Granting Congress the power to “provide for the common Defence,” to “regulate Commerce with foreign Nations,” and to “establish an uniform Rule of Naturalization”