Louisville & Nashville Railroad Co. v. Mottley

Louisville & Nashville Railroad Company v. Mottley, 211 U.S. 149 (1908), was a United States Supreme Court decision that held that under the existing statutory scheme, federal question jurisdiction could not be predicated on a plaintiff's anticipation that the defendant would raise a federal statute as a defense.

Source: Wikipedia — Louisville & Nashville Railroad Co. v. Mottley (CC BY-SA 4.0)