Limited Immunity - the two words that must terrify treasonous Senators Article I, Section 6 of the Constitution provides, in part: “They shall in all Cases, except Treason, Felony and Breach of the Peace**, be privileged from Arrest during their Attendance at the Session of their respective Houses, and in going to and returning from the same; and for any Speech or Debate in either House, they shall not be questioned in any other Place.” https://www.quora.com/Does-a-member-of-Congress-have-legal-immunity