(1) Edwards's base was primarily more conservative, working-class men, and (2) Edwards still has 18 delegates.
Edwards might be able to help him harvest a few extra delegates from Kentucky, too.
Most importantly, if those delegates go to Obama, he'll officially have the majority of pledged delegates. Conservatives want live babies so they can raise them to be dead soldiers. - George Carlin
Nice to see the mathematical implications filled in though. Any idiot can face a crisis - it's day to day living that wears you out.