up eight points. meanwhile, in texas, biden is in the lead at 23%. of the 2020 field by five points, falling three points since september. and the university of texas/texas tribune poll. and warren has 18% of support. and sanders rounds out the top three at 12. >> and presidential candidate kamala harris is responding to comments made by south carolina congressman jim clyburn about black voters and fellow candidate pete buttigieg. watch. >> is mayor buttigieg's struggle with black voters in your state of south carolina because he's gay? >> well, that's a generational issue. i know of a lot of people my age who feel that way. but i will say this, dana, my own grandson, who is 25, i think he is 25 years old, that guy is a big buttigieg guy, and of