I'd like to tell you a story. It's about two men, trapped in one body. One man: a Republican politician whose positions on the issues made him palatable even to Massachusetts voters. The other: a Tea Party Republican taking one extreme position after another on the economy, immigration, foreign policy, and more. The only thing they agree on? They both want to be president, and there's not much they wouldn't do or say to get there. You've probably guessed it -- the body they're fighting over is Mitt Romney's. And if you want to watch the struggle in full detail,...