Herman Cain on 'Letterman'

Herman Cain will be on "Late Night with David Letterman" tonight, but since Dave tapes Friday shows on Thursday, he was actually on last night. I know - sorry - TMI. 

  This interview would have been a hottie two weeks ago - in the midst of the stories, and what not. But it all feels anticlimactic, now that Cain slipped rather dramatically in the all-knowing-seeing polls. I think people'd be more excited to see Ron Paul at this point on the show. Here's a quick preview...