(a) The Supreme Court shall have original and exclusive jurisdiction of all controversies between two or more States.

Terms Used In 28 USC 1251

  • Jurisdiction: (1) The legal authority of a court to hear and decide a case. Concurrent jurisdiction exists when two courts have simultaneous responsibility for the same case. (2) The geographic area over which the court has authority to decide cases.
  • State: means a State, the District of Columbia, the Commonwealth of Puerto Rico, or any other territory or possession of the United States. See 1 USC 7

(b) The Supreme Court shall have original but not exclusive jurisdiction of:

(1) All actions or proceedings to which ambassadors, other public ministers, consuls, or vice consuls of foreign states are parties;

(2) All controversies between the United States and a State;

(3) All actions or proceedings by a State against the citizens of another State or against aliens.