DENVER, Aug. 25 -- Jon Stewart ripped the cable news networks Monday as a "brutish, slow-witted beast" and castigated Fox News as "an appendage of the Republican Party."

Wearing a gray T-shirt and a healthy stubble, the "Daily Show" host told reporters that Fox's fair-and-balanced slogan is "a (expletive) you to people with brains" and that only "Fox News Sunday" host Chris Wallace "saves that network from slapping on a bumper sticker . . ....