He was a Senator.
So was Obama. I don’t see it as a disqualification.
The rest of the GOP field isn’t too impressive.
Santorum was not only a Senator, but he was a Senator for 12 years and a congressman (from my district) for four years prior to that who actually did something while he was in congress. He’s a good man. He will make a good president. Not a great one like Reagan, but closer than anyone in contention.