After the Obama election they did a big analysis of why they lost and decided they needed make the party more appealing to POC.
The response to that was the racist ass Tea Party that now are all trump supporters. GOP has never wanted black people in their party. Going back to Reagan who chose the site of a famous lynching to announce his run for President.
GOP ain't riding with Trump like that. He forced their hand with the tariffs and his beef with Koch Bros.
Republicans will never go for the black vote because it would cost them poor white votes.