Letterman's tired routines

Has anyone else grown weary of David Letterman's jabs at President Bush? When he pokes fun at Al Gore or Bill Clinton, it is about weight or some other physical flaw. But because he hates Bush so much, he just can't seem to get away from harping on his dissatisfaction. When he has his unfunny buddy Al Franken, a real dope, on the program, it is a lovefest. When he had disgraced Dan Rather on a few weeks back, it was one long harangue against Bush. Even when Rather told him that, yes, Dave, contrary to your blindness, there was concrete evidence that Iran was behind much of the violence in Iraq, he dropped that one so fast the screen blurred. He should go away.