He might have been the best at the 2011 WHCD - but my perception might be colored by the fact that while he was displaying his impeccable comic delivery, he was at the same time preparing to wipe out Osama bin Laden. Unless he screws up big time in the next few years, Obama is going down in history as one of our greatest presidents - the great comic delivery is just gravy. But I love it so much.
And who wouldn't laugh at this line: "why don't you get a drink with Mitch McConnell?"
Not to mention the utterly perfect smack-down of Maureen Dowd.