Perry stopped because his numbers were very poor.
Both Newt and Sanborem have decent numbers and Billionaire backers. Unless their numbers really start to decline, they will continue.
If Santorum wins the nomination then Obama wins 4 more years guaranteed. There's no way people will vote in this guy.
Republicans have 2 real choices. Mitt Romney (status quo +- 2%) or the real constitutional conservative Ron Paul.
Anything else is just a vote for Obama IMO. I don't see why Republicans don't understand this yet.
....I don't see why Republicans don't understand this yet.