As Dana notes below, Clinton will concede and endorse Obama on Friday. I am, once again, inclined to a more charitable view than Matt expresses here. I have been very critical of several aspects of Clinton's campaign, although this was for specific acts (particularly the negative comparison of Obama and McCain and the increasingly farcical Michigan/Florida demagoguery) as opposed to staying in per se. But I really don't think that it will be a serious problem in the general, and endorsing the candidate three days after defeat (especially given that many runner-up candidates have declined to do so, although why Clinton-to-Denver advocates bring up 1968 and 1980 as positive precedents I can't tell you) is well within the range of acceptable behavior. Claims that Clinton was out to sabotage the party to set up a run for 2012 or some such have always been silly, and I think this should end that unproductive debate.
--Scott Lemieux