David Axelrod actually said...

these young people have a sense of mission about things like climate change, about income inequality, about social justice.

It does create a sense of momentum. And what they're hoping for is that sense of momentum carries him forward.

I think if he's going to get to where he wants to go, he better infuse his rhetoric with something more meaningful to people.

If he were to lose here, he's going to have to reconsider his race.