@joefromchicago,
Well, it's a bit of the chicken and the egg.
On a national basis, the question is how much effort and resources should be spent in trying to woo away a voting bloc that is so utterly locked into one party?
Personally, I think the GOP can and should do a better job on this score, but I understand why a candidate for president might not.
Trump is, obviously, making a pitch for the African-American vote, and it's not as if he's not making "promises." Whether or not he can deliver on the promises of jobs and neighborhood safety, clearly, remains to be seen, but he's making promises. They just don't, for now, happen to involve social programs which is the Democrats' favorite carrot.
BTW I never suggested they would "do better," I asked "What do they have to lose?"