The relationship between Black Americans and the Republican Party has drawn considerable attention in recent years. Discussions have ranged from why Black men voted for Donald Trump at higher rates than Black women in the 2020 presidential election to more recent debates about Black pop culture and the appeal of GOP-aligned candidates in both national and local politics. The partisan balance among Black adults in the United States is little changed over the last several decades, but it shifted substantially in the mid-20th century. In the 1930s, Black adults were just as likely to support the Republican Party as the…