Section 2 of Article Three delineates federal judicial power. The Case or Controversy Clause restricts the judiciary's power to actual cases and controversies, meaning that federal judicial power does not extend to cases which are hypothetical, or which are proscribed due to standing, mootness, or ripeness issues. Section 2 states that federal judiciary's power extends to cases arising under the Constitution, federal laws, federal treaties, controversies involving multiple states or foreign powers, and other enumerated areas. Section 2 gives the Supreme Court original jurisdiction when ambassadors, public officials, or the states are a party in the case, leaving the Supreme Court with appellate jurisdiction in all other areas to which the federal judiciary's jurisdiction extends. Section 2 also gives Congress the power to strip the Supreme Court of appellate jurisdiction, and establishes that all federal crimes must be tried before a jury. Section 2 does not expressly grant the federal judiciary the power of judicial review, but the courts have exercised this power since the 1803 case of "Marbury v. Madison".