I just found this article via another Daily Kos visitor’s diary:

It is a cliché to observe that the parties have drawn further apart, the center no longer holds, and partisans on both sides have withdrawn further into mutual loathing and ever more-homogenous and antagonistic groupings. Where the analysis goes wrong is in its assumption, either explicit or implicit, that both parties bear equal responsibility for this state of affairs. While partisanship may now be deeply entrenched among their voters and their elites, the truth is that the growing polarization of American politics results primarily from the growing radicalism of the Republican Party.

It’s a good article. And I’ve never heard of The Washington Monthly, but any political magazine that would write this article about Cartoon Network’s Adult Swim gets my thumbs-up!