Jonathan Chait's counteroffensive against FireDogLake’s David Dayen was a pleasure to read, even if Chait's fundamental argument--that raising Medicare's eligibility age is a warrantable political concession--remains unwarrantable. It was a pleasure simply because I don't like FireDogLake for the same reason Jonathan Chait doesn't like FireDogLake: It's "committed ... to producing the mirror image of redstate.com analysis in which your party can always win if it just fights harder."
Chait, as noted, is still wrong--extraordinarily wrong, as I wrote the other day. But Dayen's "progressive" assault on him is all too characteristic of something else that's wrong with contemporary progressivism: dissent from within is tolerated about as well as within the tea party's ranks. Violate a progressive piety and one is banished and branded as the lowest form of sell-out corporatism, which only amuses the "sell-out" and weakens progressivism's intellectual robustness.