He's not my favorite, but I actually like the guy, and would definitely give him a vote if it came down to it. I was happy to get the chance to see him in Charleston during the primary, even though I didn't vote for him.
The polls show that people continue to move forward on social issues that Santorum is still pretty radical on; I can't imagine he would win unless the economy was really in trouble. I certainly don't think he could carry PA.
Santorum does not have radically different social views than other Republicans, he just likes to talk about them more.
And that won't fly in national election in 2016. His little missteps like his "dog" comments on homosexuals will be huge fodder on the national stage, especially in 4 more years. We all saw this year what far social conservatives talking too much does to a man's chance of winning. He would have to keep his trap shut for sure, as he would already be battling the old comments.