Wyo. Const. art. 3, § 12: Rules, punishment and protection.

Each house shall have power to determine the rules of its proceedings, and [to] punish its members or other persons for contempt or disorderly behavior in its presence; to protect its members against violence or offers of bribes or private solicitation, and with the concurrence of two-thirds, to expel a member, and shall have all other powers necessary to the legislature of a free state. A member expelled for corruption shall not thereafter be eligible to either house of the legislature, and punishment for contempt or disorderly behavior shall not bar a criminal prosecution for the same offense.