Just guessing here, but perhaps Santorum is hanging on as the alternate conservative for us were Newt to pull one of his infamous gaffes - always likely with him. Wrong Paul can never be the alternate for us, he is a liberaltarian not a conservative.
Well, one thing is for sure.
Even if Newt stumbles for some reason, Newt backers should stay behind Newt, and Gingrich should stay in the race so that we have a “backup plan” in case Santorum stumbles.
Don’t want to be left without a candidate if Rick stumbles, right?