I disagree with Chait, who is overthinking Newt Gingrich's "devious" persistence:
[I]f you’re Gingrich, don’t you approach somebody close to Romney and discuss a trade? A post in his administration, some help from his donor network, maybe some customers for your lobbying historical business?
It is, I think, simpler than that.
With Gingrich, the entire cosmos can be reduced to the specific, one dimension of how well it accommodates his immense ego. Gingrich begins with ego and Gingrich ends with ego; he devours ego for breakfast, lunch and dinner; he pisses ego, he fondles it in bed at night. Newt Gingrich lives to satisfy his ego, for it is the universal leviathan that rightly yearns for ultimate fulfillment.
Therefore: Gingrich, not unjustifiably, envisions a GOP convention that Mitt Romney enters short; one ballot and he's negotiable -- the nomination is negotiable. And who is the cosmos' unparalleled negotiator, unsurpassed master of language and most exceptional leader ever? Who, then, becomes the convention delegates' most natural choice and truest savior, after being wowed by the certain and absolute brilliance of One particularly enormous ego?
President and Generalissimo Newt Gingrich, that's who, of course.
For the megalomaniacal, the game is never over until the megalomaniac says it's over.