from andrew yang and michael bennet. yang jokingly tweeted that he's going to spend his time on the debate stage going after michael bennet. he's tweeted at ben et, you know what you did. bennet tweeted back jokingly that yang had uncovered he failed a precalculus class in high school. they went back and forth. it was a light hearted moment in the campaign. senator cory booker shaved the head of supporters in exchange for donations to charity. we don't imagine there will be any of that action here in new hampshire on the campaign trail with warren today. the challenge for warren and all of these candidates in the top tier, as well as harris, joe biden is to keep this momentum going into the dedate to have a night that continues to grow support for their campaigns. that's what we're going to be watching for here in new hampshire today. jessica, victor. >> thanks so much.