Jon Stewart swung by Late Night with David Letterman and naturally the topic turned to politics. During the discussion, Stewart explained exactly what it is that the GOP doesn't like about Mitt Romney: he's trying to be Rick Santorum and failing miserably.
Tonight David Letterman celebrates 30 years on the air. It's been quite a ride for old Dave, through different timeslots and networks, from the peak of zeitgeist to something else entirely. He's hosted starlets and politicians, often treating them with a dash of anger and more than a bit of sarcasm. Here are some of the most memorable moments from his time on television.