The Politics of Resentment: Rural Consciousness in Wisconsin and the Rise of Scott Walker by Katherine J. Cramer
I read this partly to understand the election of Trump (though the book predates Trump). Also I was drawn since I had some familiarity with the political events, such as the recall election. I was interested in what it might say about modern populism such as the Brexit vote.
Wisconsin has some advantages for a study such as this since it is quite racially homogenous, I think > 88% non-hispanic white. This means that race plays a much lower role.