Rick Santorum is a spoiler. Go Newt.
How so? Santorum's support splits evenly between Romney and Newt, not because Newt's a great guy but because so many cannot countenance his repeated willingness to violate his most solemn oaths. They don't trust him.
OTOH, when Newt is out we've seen virtually ALL of it go to Santorum.
Mathematically, that makes Newt the spoiler.
Senor Newt blew it in Florida. All that pandering to illegals for nothing!