white voters, a lot of frrk voters. that's goings to carry the day for a long time early on. if you look at elizabeth warren, she's building support and gaining newer support whereas the other two have sort of a historic base to draw on. bernie sanders, i'm guessing, again this is just prognostication, is going to be who he's always been. i don't think he's a candidate who is going to come out with any gimmick, not going to try to confront joe biden on something he might have said 20 years ago. you pretty much know what you're going to get with bernie sanders. that's one of the reasons he'll be at the top of the polls and probably be. >> mark leibovich, professor greer, thank you as well. you also worked with him to oppose busing. there was a little girl in california, she was bused to school every day. and that little girl was me.