With Santorum out, it’s Ron Paul, not Newt Gingrich, who benefits (a little) (Originally posted on Yahoo!'s "The Signal" Blog)

Gingrich is excited to be the last legitimate challenger to Romney, at least in his own mind, having told Justin Sink of the Hill that "there's a conservative, named Newt Gingrich, and there's Mitt Romney." But with Santorum out, Gingrich's likelihood in any given primary contest remains negligible.

In fact, it's Ron Paul who has an increased likelihood of carrying a state with Santorum out of the way. The market on Paul winning any primary (other than the disputed Maine) jumped to a 7 percent likelihood Wednesday. He has small but non-negligible chances in a few states, including Kentucky, home of his son, Sen. Rand Paul. Santorum dropping out will allow Romney to focus fewer resources on some small states with late primaries, giving Paul and his massive national organization the opportunity for a surprise win.

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