Letterman: McCain's Ties to Gordon Liddy/terrorist

McCain may have come back with mea culpas to David Letterman after blowing him off a few weeks ago, but Letterman wasn't going to make things easy on McCain. After pointed questions on taking responsibility for hate speech incited by his campaign, as well as whether he really thinks Sarah Palin was the best choice for her Vice President, Letterman started to question McCain on his own ties to a famous "domestic terrorist" G. Gordon Liddy...or maybe we should call him Gordon the Plumber.