He seems to be coated with Teflon. Nothing is sticking.
I didn't watch the debate, but in the highlights on the news there was one exchange with Romney that really caught my attention. Romney was talking about job creation in TX and said Perry had been given 4-Aces. Perry responded "you were doing well until you started talking about Poker".
The crowd laughed, Perry was smiling, even Romney was smiling.
It struck me that this is a guy that is comfortable and quick on his feet. I'm not drawing a comparison, but Reagan was like this. He was friendly, smiled and as he cracked the joke he eviscerated his opponent.