Found a bit of vid of Dubya at the White House Correspondent’s Dinner, but, it doesn’t include this bit, unless you can get the cBS News one on the page I link below to work. I’ve had no luck

President George W. Bush poked fun at his potential successors, expressing surprise that none of them were in the audience at the White House Correspondents’ Association annual dinner.

“Senator McCain’s not here,” Bush said of Republican nominee-in-waiting John McCain. “He probably wanted to distance himself from me a little bit. You know, he’s not alone. Jenna’s moving out too.”

Bush then referred to scandals that have dogged the campaigns of the two remaining Democratic candidates, Hillary Rodham Clinton and Barack Obama, in explaining their absence: “Hillary Clinton couldn’t get in because of sniper fire and Senator Obama’s at church.”