I don't like to call people racist, just their actions, but since you might find it disingenuous for me to pull that one out in favor of Biden, I'll make an exception and say "yes he is a racist"
Now a question for you you. What's worse:
Being a racist who calls people on the tv the N-word and avoids sitting near black coworkers during lunch hour at the plant
or
Being a totally pure at heart not-racist-at-all powerful senator who pushes through a crime bill with disparate sentencing for crack versus cocaine that has awful results for black people.