The U.S. Supreme Court established judicial review, allowing federal courts to determine whether legislative and executive actions violate the Constitution. Chief Justice John Marshall ruled unanimously that William Marbury was entitled to his justice of the peace commission, but the Court lacked jurisdiction to compel Secretary of State James Madison to deliver it. The Court declared Section 13 of the Judiciary Act of 1789 unconstitutional for attempting to expand the Court's original jurisdiction beyond Article III limits. This decision positioned the Supreme Court as the final interpreter of constitutional matters.