About Book

This book explores the mutually reinforcing dynamics of political polarization in the U.S. Congress, where ideological extremism among legislators and partisan divisions within constituencies fuel each other in a cyclical process. By combining formal models, roll call analysis, and campaign dynamics, the authors demonstrate how local campaigns and national legislative behavior are deeply interconnected. The work provides logical foundations for understanding polarization, revealing its hidden drivers beyond media narratives, including institutional incentives, district-level pressures, and feedback loops in party politics.