ugliest can summon us as a nation to do better. >> now biden was here in birmingham courting that critical black vote. right now, that makes up a core constituency of his support. a recent poll cnn released found out 42% of black democratic voters support the former vice president. he'll be heading to south carolina tomorrow to continue courting black voters. >> all right, thank you so much. straight ahead, did julio castro's debate fight with joe biden just cost him an endorsement? why a sitting congressman from his own state is switching sides. anyone can deliver pizza. only marco's can deliver america's most loved pizza. hot and fresh, and right to your door. every day at marco's, get two medium, one-topping pizzas for just $6.99 each. hello to the italian way. hello primo.