Of the lower-polling candidates, I thought Bullock and Delaney were strong in pushing more moderate views. Bullock, in particular, I thought made a real impression in his first debate.
Williamson was Williamson -- I don't think she will gain much in the polls, and I don't expect to see her on the debate stage again.
Ryan, to me, didn't make much of an impression. And Hickenlooper just said very little. I would not be surprised if he drops out of the race soon.
My bottom line--I'm not sure whether any of these five will surge in the polls or be on the debate stage in September. But I think both Bullock and Delaney have succeeded in pushing the Democratic 2020 debate to the center. And I think there's an outside chance that Bullock actually gets a look from the party.