Today, the Washington Post's Howard Kurtz reported on potentially embarrassing clips of Sarah Palin being interviewed by Katie Couric that haven't yet been aired. The Politico has more information on one in particular:

Of concern to McCain's campaign, however, is a remaining and still-undisclosed clip from Palin's interview with Couric last week that has the political world buzzing.

The Palin aide, after first noting how "infuriating" it...