Primaries may contribute to polarization in other ways than a selective effect emanating from voters. This chapter tests a second potential mechanism of polarization, where incumbent members of Congress may respond to being challenged in a primary by adopting more liberal or conservative voting patterns in subsequent congresses. To test incumbents’ responses, it uses a series of fixed-effects models, clustered at the representative level, with roll-call movement as the key dependent variable. When considering the universe of all primary challenges, incumbents do not respond positionally, but when primaries are ideological and factional, they move toward their ideological pole. These effects are larger for factional primaries, indicating that incumbents are most responsive when a primary opponent has the support of an alternative party faction. These effects are larger for Republican than Democratic members of Congress, which is one way in which primaries may contribute to asymmetric polarization. These findings indicate that primaries may matter for polarization because incumbents believe them to be important and so are responsive to them.

This chapter describes the connection between state constitutions and the essential aims of regulatory governance in the American states, providing an overview of state constitutionalism and of the elements of state constitutional history as it relates to governmental structure and purpose. The basic theme of the chapter is that to understand the police power requires a fundamental understanding of the objectives of state constitutionalism. At a high level, state constitutions look to distribute effectively political power and balance democracy with the protection of individual rights. Even as fundamentally political documents, they are designed to succeed (although they occasionally fail). Likewise, the powers assigned to institutions of government are intended to facilitate constitutional success.

This chapter begins the last section, a section that explores how the police power can be used to address modern social problems. We look at a number of these wicked problems, including housing, transportation, environmental degradation, and other predicaments, and connect our conception of the police power as described earlier in this book to the use of this power proactively to confront these especially difficult problems.

This chapter looks at the ways in which the police is defined and confined by internal standards of constitutional acceptability. Before we get to the matter of individual rights, we must ask the question of whether and to what extent the police power is being used in ways that are reasonable, not arbitrary, and not the product of animus or unacceptable influence. These internal structural considerations have been used to limit the scope of the power and, more to the point of this chapter, they have the potential of being used in a way that reconciles broad governmental power with the protection of citizen interests and liberty.

In this final chapter, we explore different techniques of regulatory intervention, including regulatory alternatives, taxes, behavioral nudges and such, that can be profitably used to tackle the wicked problems described in the previous chapter, and other problems that may emerge and persist in the modern U.S.

This chapter begins a new part, this focusing on structural considerations in the scope and exercise of the police power. Some of the critical issues involving the power involve who gets to exercise it, and upon what conditions. The separation of powers among departments of government is relevant here, and there have been concerns in courts when the state legislatures delegate the exercise of this power to governors and administrators. We discuss some of these controversies in this chapter. Moreover, we discuss the ways in which the police power has long been used by local governments to implement health, safety, and welfare objectives in their community. The relationship between state and local governments, often labelled “localism,” in order to capture the constitutional dimensions of this dynamic relationship, is a focal point of this chapter.

Chapter Six begins by looking at how Americans of different racial and ethnic stripes think about politics and how these views have changed over time. This chapter looks not only at racial divisions in policy preferences but also at racial differences in public trust and confidence in institutions. Excerpts examine the echo chamber and skepticism over polling and the measurement of public opinion.