The 'rats have got to know that obama is going down. Long after he is gone he will be remembered as the most corrupt President ever. It doesn't matter if it blows up in his face sooner, before he leaves office, or later, after he's out and hiding in a non-extradition country. It will blow up in his face.
The question for a lot of 'rats is not "should I break from him and his faction" but simply when. That there will be a break from his side of the 'rat party is a given, we've seen the first rumblings of it. The question for the 'rats is, which side of the hunting party (or Congressional hearing room) do you want to be on?