On the Midwest in politics, by A.O. Scott, in the New York Times

A. O. Scott wrote in today's New York Times under the headline, "Will the Real Midwest Please Stand Up?:  The vice-presidential debate, pitting Senator JD Vance of Ohio against Gov. Tim Walz of Minnesota, shines the spotlight on a complicated region."  Here's a quote that speaks to the implicit whiteness of "Midwest."  

Like “working class,” “Midwestern” too often assumes a default setting of whiteness, and papers over profound political divisions. The region has been a fertile breeding ground for leaders of every factional stripe. Robert M. La Follette, the tribune of early-20th-century progressivism, represented Wisconsin in the U.S. Senate, as did the anti-communist crusader Joseph McCarthy a generation later. In the decades between the Civil War and the Great Depression, Ohio alone, known as “the cradle of presidents,” sent seven of its sons to the White House, all of them Republicans.

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The Midwest is a curious region, often treated less as a distinct geographical or demographic zone than as a symbol, a synonym for the country as a whole. ... in the cultural imagination “Midwest” is code for the average, ordinary, normal, real America.