"The U.S. Courts were created under Article III of the Constitution to administer justice fairly and impartially, within the jurisdiction established by the Constitution and Congress."
"Federal courts hear cases involving the constitutionality of a law, cases involving the laws and treaties of the U.S. ambassadors and public ministers, disputes between two or more states, admiralty law, also known as maritime law, and bankruptcy cases." For more information, see
About Federal Courts and
Court Role and Structure.