On the tin. Let's say that sometime in 2014, the stress of Benghazi gives Hilary a minor health scare and as a result her doctors advise her not to run. Who runs for the Dem nomination and what are their prospects? Probably there's some mix of left and center candidates, but Biden is probably out and so is Bernie (assuming that he would probably not have run if it weren't for the perception that the race was just a coronation and in any case would be a much weaker candidate without having the "not Hilary" vote to coalesce around him.