Donald Trump won the White House in 2016 by breaking up the famed electoral “blue wall,” snatching the Midwestern battleground states of Michigan and Wisconsin, along with Pennsylvania, from Democrats. He lost the White House four years later when those same states flipped to Joe Biden.Both parties are already zeroing in on the Midwest ahead of next year’s presidential election, each choosing to hold their national conventions in the region. Republicans will have their event in July 2024 in Milwaukee, the largest city in …