Trump picking Dr. Ben Carson would signal a play to go after black men. Splitting them from the stereotypical “assertive” black woman with an attitude who cares so much about having abortion as a legal method of birth control could make for interesting politics in the urban areas.
Ben Carson brings very little political help IMHO. but I love him. If one thinks Trump Jr. is running in ‘28 then Carson could make sense, and he would probably help with the black vote.