On CNN/ABC Sunday talkers, underdog keeps up anti-Romney theme and asks for one-on-one debate with frontrunner.

Santorum: “The more I look at the record of Governor Romney and match it up against Barack Obama, I feel like I am doing a training run for the general election. The same issues I’m out there campaigning on against Governor Romney are the same issues I’m going to campaign against Barack Obama on…. Governor Romney’s on the same page as Barack Obama on all of these issues.”