Santorum is bitter. Much as I hate to say it, he will endorse romney out of pure spite.
I agree that Santorum would probably endorse Romney. Santorum is living in a fantasy land where he is pure and wonderful and Mother’s little helper (since Mother is the state, this is not a good thing). He’s angry that people are not more impressed by this.
That said, his stupid answer about his taxes...they’re on his home computer and there’s nobody there to get them...should have had him laughed off the stage. Somebody that naive and non-professional (not to mention non-technological) thinks he’s qualified to be President of the US?