America's Polarized Electorate: Vote Like Thy Neighbor

NYT: Idea Lab
Vote Like Thy Neighbor
By WILLIAM A. GALSTON and PIETRO S. NIVOLA
Published: May 11, 2008

The buzz these days is that American politics may be entering a “postpartisan” era, as a new generation finds the old ideological quarrels among baby boomers to be increasingly irrelevant. In reality, matters are not so simple. Far from being postpartisan, today’s young adults are significantly more likely to identify as Democrats than were their predecessors. Along with colleagues at the Brookings and Hoover institutions, we recently completed a comprehensive study of the nation’s polarization. Our research concludes not only that the ideological differences between the political parties are growing but also that they have become embedded in American society itself....

***

Most strikingly, political polarization has become akin to political segregation. You are less likely to live near someone whose politics differ from your own. It’s well known that fewer states are competitive in presidential races than in decades past. We find similar results at the county level. In 1976, only 27 percent of voters lived in landslide counties where one candidate prevailed by 20 points or more. By 2004, 48 percent of voters lived in such counties.

What accounts for the decline of ideologically mixed localities? Bill Bishop, a journalist, and Robert Cushing, a sociologist, who have studied this issue, stress that the age of “white flight” to the suburbs is over. Instead, during the past two decades, many whites have moved to one group of cities and many blacks to another. Meanwhile, young people have deserted rural and older manufacturing areas for cities like Austin and Portland. Places with higher densities of college graduates attract even more, so that the gap between such communities and less-educated areas widens further. Zones of high education, in turn, produce more innovation and enjoy higher incomes, generating communities dominated by upper-middle-class tastes. Lower-educated regions, by contrast, tend to be more family-oriented and more faithful to traditional authority.

Not surprisingly, this demographic sorting correlates with a widening difference in political preferences. What’s more, according to Bishop and Cushing, once a tipping point is reached, majorities tend to become supermajorities. This is consistent with the findings of recent political science and social psychology: individuals in the minority of their group tend to shift their views toward the majority, while members of the majority become more extreme in their views. In such circumstances, discussions within groups often intensify, rather than moderate, the underlying polarization....

When states become more homogeneous, presidential campaigns begin by conceding a large number of contests to the opposition, disheartening their supporters in those states and increasing the majority’s electoral advantage. Polarization feeds on itself....

(William A. Galston and Pietro S. Nivola are senior fellows in governance studies at the Brookings Institution. Along with David Brady, Nivola edited Volumes 1 and 2 of “Red and Blue Nation,” from which much of the research for this essay was drawn.)

http://www.nytimes.com/2008/05/11/magazine/11wwln-idealab-t.html