Even if a few Republicans end up circling their own wagon not as much Democrats might circle theirs, I see the Republicans also in general circling their own wagon, just like you said; I see it being enough to protect the wagon.
I also see bi-partisan ass covering - something you pointed out also, in a post where you calculated that deals are likely to be made to take the heat off the culpable.
The cynic in me sees a lot of the conflict between the two parties in Washington as a big Kabuki dance to distract us from the reality that all they want to do really is get re-elected and keep their elite pampered status - Republicans and Democrats both. And once they're on the Hill, they really don't mind helping each other out to stay there.