That's interesting. I expect his gains with black voters to be disproportionately Southern and rural but this would probably be a slight gain. There are a number of black Philadelphia precincts where Romney got zero votes.
Trump in 2016 got 13% of Black male vote nationally and 4% of the Black female vote nationally.
I don't know how the vote broke down in Philadelphia in 2016.
Based on precinct results he got 4-5% of the black vote. I’m guessing this time he gets 6 or 7.
I buy the exit polls because it seems quite plausible that black people in majority white communities vote differently than those in majority black communities do.