Polarization in the American Political System: Causes and Consequences

This paper examines the rise of elite polarization within the American political system over several decades. The literature identifies a range of potential causes of polarization, including the partisan realignment of the South, the adoption and expansion of primary elections, electoral reforms, changes in voter behavior, and the increasing influence of party leadership in Congress. Although scholars continue to debate the relative importance of these factors, existing research suggests that elite polarization has significantly shaped the attitudes and behavior of ordinary citizens, particularly campaign activists. It has also influenced electoral competition between political parties by altering campaign rhetoric, policy positions, and political outcomes. Furthermore, increasing polarization has contributed to legislative gridlock, reducing both the efficiency and productivity of the legislative process and making bipartisan cooperation more difficult to achieve.