State legislatures are tasked with drawing state and federal districts and administering election law, among many other responsibilities. Yet state legislatures are themselves gerrymandered. This book examines how, why, and with what consequences, drawing on an original dataset of ninety-five state legislative maps from before and after 2011 redistricting. Identifying the institutional, political, and geographic determinants of gerrymandering, the authors find that Republican gerrymandering increased dramatically after the 2011 redistricting and bias was most extreme in states with racial segregation where Republicans drew the maps. This bias has had long-term consequences. For instance, states with the most extreme Republican gerrymandering were more likely to pass laws that restricted voting rights and undermined public health, and they were less likely to respond to COVID-19. The authors examine the implications for American democracy and for the balance of power between federal and state government; they also offer empirically grounded recommendations for reform.

The Voting Rights Act (VRA) was successfully challenged in a June 2013 case decided by the U.S. Supreme Court in Shelby County, Alabama v. Holder. The suit challenged the constitutionality of Sections 4 and 5 of the VRA, under which certain jurisdictions with a history of racial discrimination in voting-mostly in the South-were required to "pre-clear" changes to the election process with the Justice Department (the U.S. Attorney General) or the U.S. District Court for the District of Columbia. The preclearance provision (Section 5) was based on a formula (Section 4) that considered voting practices and patterns in 1964, 1968, or 1972. At issue in Shelby County was whether Congress exceeded its constitutional authority when it reauthorized the VRA in 2006-with the existing formula-thereby infringing on the rights of the states. In its ruling, the Court struck down Section 4 as outdated and not "grounded in current conditions." As a consequence, Section 5 is intact, but inoperable, unless or until Congress prescribes a new Section 4 formula.