So, basically the entire org chart just below the Oval Office has denied being Woodward's source... with the exception of Hadley, who prefers to sing and dance whenever he's pressed on the issue.
I can't avoid chuckling when I watch these rapid-fire denials since its pretty clear now, despite the lies and stonewalling, that the outing of Valerie Plame was basically a staff function. It could effectively be considered a key responsibility of White House employment during the Summer of 2003.
"They turn in clusters, because their roots connect them."