Abstract
Radical social movements can exacerbate tensions in local settings while drawing attention to how movement goals align with political party agendas. Short-term movement influence on voting outcomes can endure when orientations toward the movement disrupt social ties, embedding individuals within new discussion networks that reinforce new partisan loyalties. To demonstrate this dynamic, we employ longitudinal data to show that increases in Republican voting, across several different time intervals, were most pronounced in southern counties where the Ku Klux Klan had been active in the 1960s. In an individual-level analysis of voting intent, we show that decades after the Klan declined, racial attitudes map onto party voting among southern voters, but only in counties where the Klan had been active.