The district courts shall have original jurisdiction of all civil actions arising under the Constitution, laws, or treaties of the United States.
(June 25, 1948, ch. 646, 62 Stat. 930; Pub. L. 85–554, § 1, July 25, 1958, 72 Stat. 415; Pub. L. 94–574, § 2, Oct. 21, 1976, 90 Stat. 2721; Pub. L. 96–486, § 2(a), Dec. 1, 1980, 94 Stat. 2369.)