The judicial Power shall extend to all Cases, in Law
and Equity, arising
under this Constitution, the Laws of the United States, and Treaties
made,
or which shall be made, under their Authority; . . . --to all
Cases of
admiralty and maritime Jurisdiction;--to Controversies to which the
United
States shall be a Party;--to Controversies between two or more
States;--between
a State and Citizens of another State;--between Citizens of different
States,--between
Citizens of the same State claiming Lands under Grants of different
States,
and between a State, or the Citizens thereof, and foreign States,
Citizens
or Subjects.
28 U.S.C. § 1331. - Federal question
The district courts shall have original jurisdiction
of all civil actions
arising under the Constitution, laws, or treaties of the United States.