Do the Democrats need 'new ideas'? Or are the old ones -- or to put it more evenhandedly, the existing ones -- just fine?

This debate is actually several debates in one. And we're going to try to hash them out this week at TPMCafe. Today, tomorrow and Friday, Ken Baer (go new ideas!) of the new quarterly Democracy is going to debate Jon Chait (existing ideas are cool!) of The New Republic.

Kenny has just posted his first post and Chait will follow this afternoon.