Wisconsin and Michigan, the big bricks of the former Blue Wall, are considered must-wins for Kamala Harris. They’re also both toss-ups at this point. This week, John King talks to voters in Milwaukee and Detroit who have a lot in common: They’re both Black men, about the same age, born and raised in their respective Rust Belt cities, and steeped in a culture that always voted for Democrats. One is voting for Harris. The other is going for Trump. Their choices — and how they got there — tell us a lot about the very tight election math in the upper Midwest.  Learn more about your ad choices. Visit podcastchoices.com/adchoices