I think it’s that Trump is speaking to the blacks that have been ignored by both the Republicans and Democrats, working-class blacks who don’t buy into the racist-hatred memes of the Sharptons and the Jacksons.
I'll bet it's even more than that.
I'd be willing to bet that lots of blacks who once gave Jackson and Sharpton their ears, have finally had enough of being used as mindless minions, to enrich and empower those race baiting criminals. Not to mention, Obama is their biggest disappointment.
People of all stripes recognize how wobbly our country's become, and are looking for a real leader with the guts to actually do something about it before the whole thing implodes.