Mitt was a terrible candidate. He was and now is GLOBALLY disdained. He offered nothing, represented nothing, and the people I know of who voted for him were doing it for selfish reasons. They want to overseas contracting to continue at a high level.
Obama's 2nd debate where he failed to even practice was the President's inability to restrain contempt for the man. The problem that Mitt has to face is, election aside, Obama's estimate of him was correct. That has to be hard to take personally.