More on Edwards endorsing Obama

From the Post

Aside from the obvious demographic benefits an Edwards endorsement could have, his decision to throw his backing behind Obama also has symbolic import. Edwards is widely seen as one of the major party figures who had remained on the sidelines in the race between Clinton and Obama. That he has stepped in to the fray in hopes of, perhaps, bringing this race to an end should send a powerful signal to undecided superdelegates about the direction of the contest.