I may be wrong but I don’t think you can impeach a congressman. Also, there are about 40 Marxist democrats in the house. It’s widely known and their constituents keep electing them. Conyers isn’t going anywhere just because of his association with certain political groups.
You cannot impeach a Congressman.
However, the House could eject him, if it chose.
Not gonna happen.
Americans already know this and there isn’t a whole lot anyone can or will do about it.