 The executive power is exercised by the executive branch, which is headed by the President, advised by a cabinet of secretaries that are independent of the legislature.Legislative power is vested upon the Congress of the Union, a two-chamber legislature comprising the Senate of the Republic and the Chamber of Deputies.Judicial power is exercised by the judiciary, consisting of the Supreme Court of Justice of the Nation, the Council of the Federal Judiciary and the collegiate, unitary and district tribunals.