The correct answer to this open question is the following.
Individuals who are members of a labor union, live in Michigan and identify as African-American would tend to vote for political candidates who are Democrats.
United States citizens that live in the Michigan region and that are members of labor unions tend to create some kind of affinity with the candidates of the Democratic Party. In the past, these groups have asked the state and federal governments for some work and social programs that help the workers of America. Furthermore, the fact that this group of people is African Americans, tend to express their vote in favor of Democrats since the 1960s.