The thing that President Obama needs to keep in mind about Mitt Romney is that he is a ruthless, amoral son of a bitch. Like Bain Capital, he makes promises that are lies when they get in the way of his greater good or his bottom line. With his polished smile and primped hair, Romney is one of the most outright depraved and evil sociopaths ever to run for office, and that's including Richard Nixon and Pat Robertson.
Beware the man who presents himself as honorable when his actions have demonstrated nothing but disgrace.
I pulled the final assessment, the examples of Romney behavior that formed the basis of that assessment are in Rude's post for the reading.