something. coming up with the debate i think that biden and booker -- i mean harris and booker need to be careful not to keep honing in on racial issues from 40 years ago or things that happened all these years ago because you do not want to depress the black vote -- >> let me just say this. hold on. you guys after this because you know this whole thing about biden changing his tone, this is senior campaign official telling cnn, quote, and then i'll let you guys hash it out. he isn't going to take hits from any of the candidates sitting down. he won't personally attack anyone, but he will be very clear about the contrast between he and other candidates in this race. discuss. >> and the reason i'm saying this is because joe biden, his commitment to civil rights and his commitment to issues that affect the black community have never been in question when he was asked to be the vice president of the united states for eight years under barack obama. it wasn't a problem then. it wasn't a problem with harris asking her to introduce her at