This book considers the political and constitutional consequences of Vieth v. Jubelirer (2004), where the Supreme Court held that partisan gerrymandering challenges could no longer be adjudicated by the courts. Through a rigorous scientific analysis of US House district maps, the authors argue that partisan bias increased dramatically in the 2010 redistricting round after the Vieth decision, both at the national and state level. From a constitutional perspective, unrestrained partisan gerrymandering poses a critical threat to a central pillar of American democracy, popular sovereignty. State legislatures now effectively determine the political composition of the US House. The book answers the Court's challenge to find a new standard for gerrymandering that is both constitutionally grounded and legally manageable. It argues that the scientifically rigorous partisan symmetry measure is an appropriate legal standard for partisan gerrymandering, as it logically implies the constitutional right to individual equality and can be practically applied.

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.

This book considers the political and constitutional consequences of Vieth v. Jubelirer (2004), where the Supreme Court held that partisan gerrymandering challenges could no longer be adjudicated by the courts. Through a rigorous scientific analysis of US House district maps, the authors argue that partisan bias increased dramatically in the 2010 redistricting round after the Vieth decision, both at the national and state level. From a constitutional perspective, unrestrained partisan gerrymandering poses a critical threat to a central pillar of American democracy, popular sovereignty. State legislatures now effectively determine the political composition of the US House. The book answers the Court's challenge to find a new standard for gerrymandering that is both constitutionally grounded and legally manageable. It argues that the scientifically rigorous partisan symmetry measure is an appropriate legal standard for partisan gerrymandering, as it logically implies the constitutional right to individual equality and can be practically applied.

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.