Barack Obama tends to be pretty strong in settings like this. But you can see the chinks in his armor, even in the “summit” setting. He gets prickly from time to time (you could see it in his exchange with Senator Alexander). He tends toward solipsism (his opening statement was about him, about his children, about his youth). And he’s strikingly arrogant, constantly putting himself in the position to deem what is a “legitimate” and what is an “illegitimate” argument. We also saw that same arrogance in his explanation of the uneven time allotted to people for speaking. He justifies it because, we were all delighted to learn, “I’m the president”: Obama decided not to count his speaking time against the time allotted to the Democratic side, which is silly. But we also saw Obama’s arrogance in his insistence that he is right and that Lamar Alexander is wrong about whether ObamaCare would increase premiums. As Jen Rubin and James Capretta demonstrate — and as Representative Dave Camp and Senator Jon Kyl argued during the session — it is Obama who was in error. President Obama is the best spokesman Democrats have. But the truth is that these days he’s not all that impressive.