Santorum didn't just lose last time around, he got blown out in an epic fail landslide defeat. You can't lose your last statewide election by 18 points and then run for President and expect to do well. Santorum is a good man and right on most of the issues, but there are just too many doubts about his electability until he goes back home and wins an election or two to clear the stink away from that 2006 defeat.
As I’ve told others, find out how and why that election turned out that way, then you may change your mind.
I’m not waiting for him to go home as some advise. There is a good man with good ideas that are doable and a track record that far outshines that 2006 election.