Yes. Serving an indictment and arresting them will expel them. The congress is partially immune to some crimes under the "speech or debate" clause, but they are NOT immune to crimes involving
Disturbing the public peace, such as participating in a riot or bailing out rioters so they can go back to rioting.
Treason, such as impeachment as a weapon while ignoring exculpatory brady evidence for the defense of the president
Felony. Felony is ANY federal crime violation or statewise, any "major" crime considered a felony in that state
In the case of the congress, it would either federal violation or a violation of the district of columbia, acting as a state (city-state / jurisdiction...dc is not technically a state just yet)
...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 from the same; and for any Speech or Debate in either House, they shall not be questioned in any other Place.
Imprisonment.
Yes. Serving an indictment and arresting them will expel them. The congress is partially immune to some crimes under the "speech or debate" clause, but they are NOT immune to crimes involving