They started out sort of shambling. They're each clearly and very understandably worn out. (Not as much Richardson. But then, hey, he's not really in the race.) Then they engaged. And I found myself being proud of them as a group, because the caliber of the discussion was so much higher than that of the Republicans. But the real engagement happened at about 9:30 on the topic of change. I noted what was said in the post below. But since then, it seems like that was the emotional crux of the debate. Like the key points were aired and the emotional tension was broken. After that the energy sort of drained out of the discussion.