For a number of odd reasons related to group psychology, I think Trump either gets 8-12% or gets 25 to 30% of the Black Vote, and I do not think that he would get in between those ranges. Mostly it is rated to does the group identity hold.
That is the result of collectivism and leftism in the mostly black neighborhoods, I fail to see how defending Clinton who wants to give mass amnesty to Illegals will help places like Chicago, it is not PC but its the truth.