By inviting Israeli Prime Minister Benjamin Netanyahu to address Congress, John Boehner directly dealt in foreign policy and violated the "Logan Act", thus usurping the powers of the presidency of the United States.
Text of the Logan Act:
Any citizen of the United States, wherever he may be, who, without authority of the United States, directly or indirectly commences or carries on any correspondence or intercourse with any foreign government or any officer or agent thereof, with intent to influence the measures or conduct of any foreign government or of any officer or agent thereof, in relation to any disputes or controversies with the United States, or to defeat the measures of the United States, shall be fined under this title or imprisoned not more than three years, or both.