Expulsion from the United States Congress

Expulsion is the most serious form of disciplinary action that can be taken against a member of Congress. The United States Constitution (Article I, Section 5, Clause 2) provides that "Each House [of Congress] may determine the Rules of its proceedings, punish its members for disorderly behavior, and with the concurrence of two-thirds, expel a member." The process for expulsion from the House of Representatives differs somewhat from the process for expulsion from the Senate.

Source: Wikipedia — Expulsion from the United States Congress (CC BY-SA 4.0)