I live in lower peninsula Michigan and there are large numbers of black voters in the urban areas of Flint, Jackson, Battle Creek, Kalamazoo, Benton Harbor, St.Joseph, Grand Rapids, and Muskegon. I get a vibe that allegiances are shifting. It is reinforced every time President Trump visits Michigan to campaign.
These are separate from and in addition to the greater Detroit Metro area. I believe that the days of our late, black Detroit mayor Coleman Young telling fellow black voters to vote Dem, from his official residence; the Manoogian Mansion, are over.