I agree. But neither Mittens nor Obama will enter into an honest debate about this. It will be a total smear against Santorum, using his words against him in the worst possible way.
Obama's machine will do to Santorum what LBJ's machine did to Goldwater - smear a decent man.
At the time BG was a decent man, at least what we knew of him.
But LBJ only continued what the RINOs started. Even after he got the nomination, he received less support from the GOP than any other nominee before or since. Nixon was the very rare exception (Reagan hadn’t yet held office), and Nixon won the following election.