Recalling congressional representatives is probably not allowed. AFAICT, however, there has never been a federal court ruling on the (likely) exclusive right of congress to expel members.
The closest I could find was Burton v. U.S., where the court declined to rule, since the law in question didn't apply to senators at the time.
The closest I could find was Burton v. U.S., where the court declined to rule, since the law in question didn't apply to senators at the time.