Contemporary American politics features intense political polarization and closely contested battles over the direction of public policy. Conservatives and liberals alike have used the many venues in the American federal system to try to gain an advantage. In this article, we suggest that a key feature of contemporary American federalism is the institutional advantage that conservatives have achieved due to recent shifts in the ideological conservatism of the federal judiciary and growing Republican dominance in state legislatures. We assess the consequences of these developments, focusing on efforts to weaken federal administrative agencies’ authority and discretion, challenge individual voting rights and institutional control over electio...