Secretaries of State don't usually last more than a single presidential term. And sometimes they don't make it that long. So, for the life of me, I do not understand why Hillary Clinton would want to give up what is in all likelihood a senate seat for life to run the State Department for Barack Obama.

Late Update: This post, not surprisingly, has generated a big response. And a few of you have suggested that this is a way for Hillary to angle for another shot at the presidency in 2012 or 2016. But that strikes me as deeply, deeply improbable. Never an easy thing to challenge a sitting president of your own party, next to impossible to do it from his own cabinet. I don't have an answer on why either party would want this appointment. But that ain't the reason.