Since Marbury v. Madison the Supreme Court has been the final arbiter of the constitutionality of congressional legislation. Relevant laws to this case “In all Cases affecting Ambassadors, other public Ministers and Consuls, and those in which a State shall be a Party, the supreme Court shall have original Jurisdiction. In all the other Cases before mentioned [within the judicial power of the United States], the supreme Court shall have appellate Jurisdiction, both as to Law and Fact, with such Exceptions, and under such Regulations as the Congress shall make.” Which is from the U.S. Constitution, Article III, Section 2, Clause