I think in future editions of the dictionary, when you look up "Peter Principle", there will be a little line drawing of Barry O. gazing sternly into the distance with that "Who farted?" expression on his face.
The party insiders that got behind this guy have got to be having serious buyer's remorse by this point. They looked at Barry and saw a dynamic, good-looking, young-ish guy who could rally a crowd and thought "We could get this guy into the White House!" and nobody stopped to think for a minute that he was already in over his head as a Senator.
EDIT: Biggest belly laugh I've had on the 'net today: