After getting dissed and dumped, David Letterman has been on a John McCain tear of late. From bashing the candidate in his opening monologue to inviting actress Julia Louis-Dreyfuss on the show for another dose of vitriol, the Late Show host has been snuffing up the YouTube views. On Friday night, NBC Nightly News anchor Brian Williams sat down for another opportunity for Letterman to attack Palin after watching her dodge-y VP debate performance.

Kudos to Williams for not only remaining neutral — "I can't correct you because I have no opinions" — but steering Letterman to seeing all sides … and then letting him crap on Palin.

Interesting, however:

… that Letterman welcomed Williams — who anchors a newscast on a competing network and who has not yet interviewed Sarah Palin — and has yet to ask on CBS's own Katie Couric, who has interviewed Palin.

Perhaps it's payback for Couric nabbing McCain when Letterman was supposed to?