If Bernie had gone negative

[Angrie]

It wouldn't have made much difference. Right wing attacks would not have materially helped him with Democratic primary voters.

The one thing he could have done is maybe to be more aggressive with left-wing attacks, like the Wall Street transcripts. But he was fairly aggressive with that already.

Also, what he really needed to do was to break through with black voters. He handled the questions about whether he supported Obama horribly. He should have cast his campaign as an effort to take the attempts at change that Obama began further, and he should have given more emphasis to GOP control of congress as a reason that has stopped Obama from being able to do everything that he wanted. He should have argued that for that reason, we need to keep pushing hard for more progressive reforms, and that's what his campaign is about.