Rick Santorum has shown he is a tireless campaigner and is the number one choice of evangelical voters. Now the former Pennsylvania senator is saying he is open to the idea of filling the nation's number two slot if his fellow GOP front-runner secures the party's nomination. In a Monday interview with CBN's David Brody, when Santorum was asked if he would consider running alongside Mitt Romney as the vice presidential nominee, he gave an affirmative reply. "Of course," Santorum told Brody. "I mean, look. I would do in this race as I always say, this is the most important...