My favorite current stand-up comedian, Lewis Black, was the featured entertainer at the 61st Annual Radio and Television Correspondents Dinner where he drew the kind of spot that is every comic's dream: Following Dick Cheney paying tribute to a dead Pope. Talk about your great warm-ups. He was also required to wear a tux and to avoid the use of naughty words or inflammatory rhetoric. In his regular act, Black has been known to describe Cheney as "pure evil" but I guess you don't want to use that material when the guy's seated on the dais about five feet from you.
You may or may not be able to view video of the event over at the C-Span website, where things don't seem to be working too well. What you'll want to do is go there and do a search for "61st annual." Then if the site's functional and you have Real Player installed, the whole 80 minute event just might load. Mr. Black goes on around 36 minutes into it and you'll probably want to Fast Forward to him.
It's an odd performance and Black spends much of it discussing how it's a bad place for a comedian to work. The audience is not well-miked so I think he got more laughs than the video would seem to indicate, but it's still far from him at his best. I just mention it because if you think Lewis Black looks uncomfortable on The Daily Show, you oughta see him trying to amuse the Washington elite. I try to watch these every year and I don't recall any comic doing all that well with this crowd.