My first reaction is god dammit
. Dean won't be running for a second term as DNC chair. While this doesn't directly impact the White House, it will have a huge impact on the character of the national party and frees up a big gun for another spot, either in the Administration or a possible Senate run.
I'm not terribly worried about a backslide in the DNC, since I'm sure Obama will appoint someone who has their head on straight, but I have to say I'd really rather see Dean getting more respect from the party proper. Considering what he's managed he should be the Newt of the left.