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Throughout history, populist leaders have excelled at disrupting political norms and reshaping voter behavior. The United States is not immune to this pattern. Donald Trump and his MAGA movement represent the latest iteration of the American populist legacy. Contemporary political discourse is often framed around Trump, placing us firmly in the “Trump era” of American politics. This thesis investigates voting shifts during the Trump era, covering presidential elections from 2016 to 2024. Electoral changes are mapped at the county level to spatialize shifts in Trump’s coalition. Random forest regression and k-means clustering then assess the influence of ten variables on electoral change. A deeper analysis focuses on counties with the most significant political swings. The thesis finds that Hispanic and White demographics, income levels, and educational attainment most heavily influenced Trump’s coalition, while religious affiliation and net migration rates were less significant.