congressional immunity
Either of two special immunities given to members of Congress: (1) the exemption from arrest while attending a session of the body to which the member belongs, excluding an arrest for treason, breach of the peace, or a felony, or (2) the exemption from arrest or questioning for any speech or debate entered into during a legislative session. U.S. Const. art. I, § 6, cl. 1. See SPEECH AND DEBATE CLAUSE. [Cases: United States 12. C.J.S. United States §§ 27–28.]