Adding onto David Strom's take on Edwards' boycott of Fox News, Jonah Goldberg has some further thoughts on where the fallout could eventually lead:

Fox’s biggest critics don’t appreciate why Fox News exists in the first place. It was created because vast numbers of Americans — including many Democratic voters — saw the mainstream media as too liberal and too elitist. Proof that Fox’s creators were right can be found in its enormous ratings success. In response to that success — as well as conservative talk radio’s - liberals have become obsessed with creating their own alternative media. The most famous example, Air America, has been a giant failure, and maybe that explains part of the left’s mounting frustration with Fox. It just seems so unfair that viewers like Fox but don’t really want to watch Al Franken whine about Dick Cheney all day.

Regardless, the Edwards Maneuver ratchets this whole cycle up to a new level. Already, conservatives are mumbling that their politicians shouldn’t appear on liberal networks. That’s hardly surprising. After 40 years of bashing the media from the right, conservatives are unlikely to get one-upped now.

This process of media balkanization may well be inevitable. I’ve long argued that we’re heading toward a European-style press where newspapers and networks are more honest about their ideological biases. But in an age where the press and many politicians decry this division, it’s worth pointing out what we’re getting ourselves into. [Or going back to--Ed.]

For example, Edwards was tactically very smart to do what he did. But he’s also the guy who decries the “two Americas” and hopes to unite them. It’s a dumb metaphor, but by Edwards’s own standards, Fox speaks to one of those two Americas. And boycotting Fox isn’t going to help close that gap.