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I think there's a bogus assumption in this article: that any candidate for a position will be turned down if he or she does not have a squeaky clean past. I mean no offense to the author of this piece, but that's the kind of polarized thinking that's screwed up this country for the past ten years. Either you're completely clean or you're unacceptably dirty. Bah.
Clearly Obama wants to know the background details to avoid any controversy, but if he chooses to bypass people with a few embarrassing blog responses then he isn't the realist that I voted for. He's being careful, and I'm glad he's careful about his decisions.