The longer they are there, the more skeletons they accumulate that they don't want exposed.
Cute lobbyists, opportunities to trade on insider knowledge -- the skeletons don't get exposed as long as they do not piss off the Dems. It's just easier to play ball.
I would be curious to know how many of them and how much they have in off-shore accounts.
Isn’t it strange that, for example, Michelle Bachmann recently became a Swiss citizen?
The solution to this affliction of Washingtonitis is to repeal the 17th Amendment and allow the Governor and/or State Legislatures to appoint their Senators directly, with an ability to recall them if they stop representing the will of their state, or at will upon the seating of a new Governor. The Senate was supposed to represent the will of the States, not the will of the People. That is what the House is for.