a tangible excitement going around her campaign. >> absolutely. i think this is her firing a warning shot at the other democrats in this race that she has something behind her that's real and tangible and that can get our attention as people in the media, but also get the president's attention. i do think crowds matter, and we should -- even though we're in blue new york city, it does still matter that people will show up on a monday night and wait outside for hours and hours. they're saying it's tens of thousands of people. anything close to that, i think, would be a massive crowd worth mentioning. >> warren also picking up a key endorsement today from the working families party, a grassroots progress group. bernie sanders got it in 2016. has progressive momentum shifted to the warren campaign, do you think? >> well, i think it's split. what i think is even more significant is progressivism, as it were, is growing throughout people who have traditionally