I think he will be out after Florida - perhaps even sooner since it doesn’t appear he can even compete in the sunshine state. His win in Iowa sort of entitles him to at least try for a bit longer I suppose, but everyone knows Santorum is not going to be the nominee.
I hope he goes back to PA and runs and wins an election or two and gives it another shot on a national level in some future presidential cycle. It was just too soon for him after losing by 18 in 2006.
He should stay in so we can have a protest vote against the two ughs.