nobody has been able to trip her up yet. so far she hasn't. >> that new poll, national number out there, quinnipiac national poll. warren is at 30% nationally among democrats. you start to look at the groups of voters she's doing best with, self identified liberal, college educated white voters. look at her polling with black voters in that poll. she is still almost 3-1 trailing joe biden. is that a group she can ultimately break through or is she facing more of an obstacle there than folks appreciate? >> i think when we drill down into those numbers, steve, there's some generational stuff. she seems to be polling well, if my memory corrects -- if my memory is correct, among younger african-american voters. if she's successful in iowa, if she turns the corner in new hampshire, i'm not convinced that the firewall of african-american voters will