Given my previous complaints about Barack Obama’s reluctance to go negative, I’m happy to see him start taking on Hillary, but the grounds on which he chose to do so is bizarre. You don’t take down a frontrunner by talking about what exactly she said about Social Security to some voter in Iowa — it’s the wrong issue substantively and politically and, frankly, no one outside the Beltway cares.

Obama later expanded his critique of Hillary not being sufficiently forthcoming about her views to Iran and Iraq, but again, it’s not a policy difference. At this point, 95% of Democratic primary voters couldn’t explain one substantive distinction between Obama and Clinton. Kevin Drum tries to come up with some ideas — maybe Obama’s people are reading?

Anyway, Obama’s coming to Durham on Thursday so I’ll hopefully get to see the road show in person.