“I’m open to it, yeah,” Santorum replied. “I think there’s a fight right now as to what the soul of the Republican party’s going to be and the conservative movement, and we have something to say about that. I think from our battle, we’re not going to leave the field.”

… The nomination eventually went to Mitt Romney, whom Santorum argued did not focus on what he considered the “main issue” of the race: The role of government in the lives of Americans.

“We didn’t make that argument in this race. Our candidate didn’t make that argument, as some of us said during the campaign, because he was not capable of making that argument,” Santorum said. “In my opinion, what could have been and what should have been a referendum election on what it means to be an American, what it means for us as a country to head down the road toward European socialism, we just simply didn’t make the argument at a time when I think America was ripe to hear the argument.”