You're forgiven for not noticing David Letterman's repeat bashing of John McCain last night, since the most important thing on his show was the excellent Paul Newman tribute. But Letterman did get a swipe in during the monologue at interview bailer McCain, and so did guest Julia Louis-Dreyfus, who, in a show of support, stopped by Letterman at the same time she was expected at another interview, bailing on that one. Con quien?