Mitt Romney is now having to come up with an answer for an extremely legitimate challenge coming from what many of us would have considered unlikely possibility just a few weeks ago in Newt Gingrich.  He has been shooting some negativity the former Speaker's way in an interview with Fox News' Bret Baier.  In addition, a top aide to Mr. Romney has called Mr. Gingrich evil.

For Newt's part, he is fielding an interesting strategy to respond to the former Massachusetts Governor.

What do you think?  Which one is the best choice for Republicans?