That would be Sarah Palin... I'm tempted to say "out of her mind," but like dubya, I think that misunderestimates her canniness with respect to the things in which she's interested. Obviously, the English language is not one of those things: "I just think that anyone is foolish to prematurely close any door that perhaps will be open for them." I think it would indeed be foolish to try to close a door that might (or might not) be open in the future, however, I doubt she has any real interest in running for the presidency, let alone- again noting dubya- carrying out the duties of that office.
I read recently that with his much-publicized plummet in favorability ratings, Obama stands at a miniscule 48%. Palin's grass-roots popularity is an astronomically high 22%. She's a shoe-in.
Snark aside, what is Palin interested in? She's an egotistical narcissist: She wants attention. She wants the media spotlight and cash that go with attention. I predict she will announce a run for the nomination, though she will make a lot of fuss about how the Republican good ol' boys club is sidelining her- which they will. She will raise a lot of money and get a lot of air time- that's what she's interested in. Then, when it crumbles around her, as it inevitably will- she's not interested in doing the work to run a real campaign- she'll bow out and blame the "liberal, lamestream media." Then go back to her job at faux news. As an aside, if you were a candidate on the R side of the last presidential nomination, not currently holding office, and not named Mitt Romney, you are currently employed by faux news. True story.
At any rate, let's let Sarah get the almost last word: "A nuclear weapon in that country's [Iran's] hands is not just Israel's problem or America's problem – it is the world's problem. It could lead to Armageddon. It could lead to World War III that could decimate so much of this planet." This could be rephrased to point out that this country in SP's hands could well be much, much worse than simply reducing so much of this planet by a tenth.