What really matters (some version of which can be found in most of the Edwards Endorses Obama coverage):

“[John ]Edwards is a prominent Democrat who speaks on behalf of lunch bucket-carrying, hard hat-wearing, Dunkin’ Donut-eating Democrats,” said Chris Lehane, a Democratic strategist who worked on Gore’s 2000 presidential campaign. He can help Obama “counter the story line on whether he can or cannot win those particular voters.”

Winning those particular voters? Winning the story line about those particular voters! (Update your scripts, campaign press, there’s a new narrative in town!)