Here’s how I see it:
There are plenty of blacks who don’t like Republicans but do like Trump. I’m not concerned about a poor showing from a GOP candidate when Trump is not on the ballot. A 34 % approval rating isn’t bad at all and if it translates to even 17% of the vote, it’s big trouble for the Democrats. Does anyone know what Bush-43’s approval was among blacks in 2004? I’m guessing not very high.