What do you mean the senate can remove its own members? is that even constituional?
They have the power. It would have to be something serious though, such as preaching sedition.
Certainly. Article I, section 5 of the U.S. Constitution provides that each chamber of Congress “shall be the Judge of the Elections, Returns and Qualifications of its own Members” and may “punish its Members for disorderly Behavior.” Over its more than 200-year history, the Senate has developed procedures for judging the qualifications of its members in contested elections and for taking disciplinary action against Senators through such measures as formal censure or actual expulsion from the Senate.