Switching parties is arguably the most important decision a politician will ever make. This book is the first-ever systematic study of the causes and consequences of legislative party switching in the United States. The author argues that re-election alone does not explain party switching. He proposes an ambition-based theory that accounts for multiple goals (including higher office aspirations and the desire for influence in the legislature) with a focus on the electoral costs and the institutional benefits of the decision. The book combines the statistical analysis of electoral data and legislative careers in the US Congress and state legislatures with elite interviews of party switchers, non-switchers, and a party leader. The case study of a party switcher's decision in 'real time' documents the complexity of the decision in a politician's own words prior to and following the switch. The book raises important questions regarding the meaning of a party label.

American Gridlock brings together the country's preeminent experts on the causes, characteristics, and consequences of partisan polarization in US politics and government, with each chapter presenting original scholarship and novel data. This book is the first to combine research on all facets of polarization, among the public (both voters and activists), in our federal institutions (Congress, the presidency, and the Supreme Court), at the state level, and in the media. Each chapter includes a bullet-point summary of its main argument and conclusions, and is written in clear prose that highlights the substantive implications of polarization for representation and policy-making. Authors examine polarization with an array of current and historical data, including public opinion surveys, electoral and legislative and congressional data, experimental data, and content analyses of media outlets. American Gridlock's theoretical and empirical depth distinguishes it from any other volume on polarization.

American Gridlock brings together the country's preeminent experts on the causes, characteristics, and consequences of partisan polarization in US politics and government, with each chapter presenting original scholarship and novel data. This book is the first to combine research on all facets of polarization, among the public (both voters and activists), in our federal institutions (Congress, the presidency, and the Supreme Court), at the state level, and in the media. Each chapter includes a bullet-point summary of its main argument and conclusions, and is written in clear prose that highlights the substantive implications of polarization for representation and policy-making. Authors examine polarization with an array of current and historical data, including public opinion surveys, electoral and legislative and congressional data, experimental data, and content analyses of media outlets. American Gridlock's theoretical and empirical depth distinguishes it from any other volume on polarization.

Switching parties is arguably the most important decision a politician will ever make. This book is the first-ever systematic study of the causes and consequences of legislative party switching in the United States. The author argues that re-election alone does not explain party switching. He proposes an ambition-based theory that accounts for multiple goals (including higher office aspirations and the desire for influence in the legislature) with a focus on the electoral costs and the institutional benefits of the decision. The book combines the statistical analysis of electoral data and legislative careers in the US Congress and state legislatures with elite interviews of party switchers, non-switchers, and a party leader. The case study of a party switcher's decision in 'real time' documents the complexity of the decision in a politician's own words prior to and following the switch. The book raises important questions regarding the meaning of a party label.