Happy Birthday to David Greenwalt, 64.
Some good stuff:
1. Joshua Huder with the case that it's internal Congressional incentives, rules, and procedures that produce the extreme polarization we're seeing. I have no argument with that; however, I'll note that the presidency, too, has become far more partisan than it has been. Regulars know what I think: strong parties, including strong party networks, are a significant factors in all of this.
2. I don't think that Ross Douthat's argument about the radicals and policy really holds up...but it's worth taking seriously.
3. Medicare Advantage is doing just fine? That's what Kate Pickert reports.
4. More from Ray La Raja on campaign finance.
5. And Dan Drezner on a potential Marx comeback in political economy. I can't really speak to that, I guess; I think of Marx as an important political theorist, but weak on economics.