Machine generated contents note:
Preface
1. Introduction
2. What is Political Polarization?
3. Are Partisan Elites Polarized?
4. Is the Public Polarized?
5. What Are The Causes of Polarization?
6. How Does Electoral Law Affect Legislative Polarization?
7. How Have Other Changes in American Society Affected?
8. What are the Consequences of Polarization for Public Policy and Governance?
9. Is the Trump Presidency a New Normal or More of the Same?
Bibliography.