that eight years later, six years later we shouldn't be growing and evolving. and i think that there is a part of the party and frankly who i consider to be the movable middle for the democrats are really those young people, and those progressives who sometimes sit home and don't actually participate because they're not feeling moved and not excited. >> wait, you're saying young people -- you're saying young people and progressives are the middle of the party? >> i'm saying that when i say movable middle, i mean people we need to move to the polls. they're not the most reliable voters all the time because sometimes young people show up, sometimes they show up less, right? i believe that we need to do is we need to focus on how do we get the base out in mass to beat donald trump, and i think that that's not about desecrating obama, but it's absolutely about being aspirational. and there's nothing wrong with all those candidates on the stage saying, this was great, and here's where we actually need to go next. >> david gergen, i've only been reporting on politics since the mid '90s.