Abstract
The U.S. two-party system was transformed in the 1960s, when the Democratic Party abandoned its Jim Crow protectionism to incorporate the policy agenda fostered by the Civil Rights Movement and the Republican Party redirected its platform toward socioeconomic and racial conservatism. We argue that the policy agendas that the parties promote through presidents and state legislatures codify a racially patterned access to resources and power detrimental to the health of all. To test the hypothesis that fluctuations in overall and race-specific infant mortality rates (IMR) shift between the parties in power before and after the Political Realignment, we apply panel data analysis methods to state-level data from the National Center for Health Statistics, 1915–2017. Net of trend, overall, and race-specific infant mortality rates were not statistically different between presidential parties before the Political Realignment. This pattern, however, changed after the Political Realignment, with Republican administrations consistently underperforming Democratic ones. Net of trend, non-Southern state legislatures controlled by Republicans underperform Democratic ones in overall and racial IMRs in both periods.