why isn't this guy on Fox?

Matthews: The netroots ‘get their giggles from sitting in the backseat and bitching.’
(Think Progress)
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I know that occasionally he leans mildly left, but c'mon!
Markos from Daily Kos gets a chance to respond:
Ed Schultz Brings on Markos Moulitsas to Respond to Matthews Netroots Insult
(Crooks and Liars)