Rick Santorum

Primed for a fight, Mitt Romney and Rick Santorum traded fiery accusations about health care, spending earmarks and federal bailouts Wednesday night in the 20th and possibly final debate of the roller-coaster race for the Republican presidential nomination.

Philosophical differences between the top two Republican presidential candidates are becoming starker.

Michigan Gov. Rick Snyder is backing Mitt Romney's bid for the Republican presidential nomination, calling the former Massachusetts governor "the man for the job."

Mitt Romney came out of Iowa the declared winner.  But a great amount of time later the news came out that the 8 vote plurality in the Iowa caucuses may have been in error, and that Rick Santorum may have actually won.  That's the kind of misfortune that would sink most candidates out of the gate...

There's nothing like a few victories to boost a candidate's fundraising -- and Rick Santorum says he's collected $400,000 in the past couple of days, including $250,000 since his wins yesterday in three states.