The 20th Republican debate:
There was something odd in the last debate where Ron Paul seemed to be ganging up on Santorum while not critiquing Romney. After all, from Paul's perspective, both candidates are too "big government". What gives?
No answer right now, but Think Progress reports Ron Paul Never Attacked Romney Once During 20 Debates, But Attacked Romney’s Rivals 39 Times
You can at least say this: Ron Paul is not a principled libertarian. If he was, he'd have attacked Romney plenty of times by now. Instead, he's doing some of Romney's dirty work.