Herman Cain suspended his campaign today. He said "suspended" so he can continue to raise money, but he's done. He says he will endorse a candidate "in the near future". Based on his recent appearance with Newt Gingrich at a "debate", as well as Newt's current status as frontrunner, makes Newt most likely to pick up a few more percentage points as a result of today's announcement.
He'll also become more likely to beat Romney. Cain being out of the running means the "anti-Romney" vote is split one fewer way, meaning Romney's amazingly-stable 20-25% in the polls less likely to hold up.