What could be very interesting is if Obama doesn't enter the race at all. The POD is very easy: Michelle says no in 2006, as she almost did IOTL. In that case this is a straightforward battle between the Democratic left (Edwards) and DLC centre-right (Clinton). Ironically both Clinton and Edwards were planning for such an outcome IOTL, and my money is on Clinton. She'll split or get a plurality of the WWC vote against Edwards and have a lock on both blacks and Hispanics. Rielle Hunter's pregnancy was already underway and once that is revealed shortly after Super Tuesday, Edwards is thermonuked and Clinton wins by default. If Obama comes in third in Iowa behind Clinton and Edwards, then he's in serious trouble.