I think their participation highlights a difference between the way Bill handles a scandal and the way Barack does. Bill likes to get out in front of it and talk his way out of it. Barack prefers to fold his arms and dare anyone to "make me."
Bill is a con artist. Barack is a belligerent man-child
You’re certainly right about the different response styles of Clinton and Obama. It confirms the notion that the Clintons are behind the Pelosi 180.