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Democratic and Republican partisans dislike the opposing party and its leaders far more than in the past. However, recent studies have argued that the rise of affective polarization in the electorate does not reflect growing policy or ideological differences between supporters of the two parties. According to this view, though Democratic and Republican elites are sharply divided along ideological lines, differences between the policy preferences of rank-and-file partisans remain modest. In this article, we show that there is a close connection between ideological and affective polarization. We present evidence from American National Election Studies surveys that opinions on social welfare issues have become increasingly consistent and divided along party lines and that social welfare ideology is now strongly related to feelings about the opposing party and its leaders. In addition, we present results from a survey experiment showing that ideological distance strongly influences feelings toward opposing party candidates and the party as a whole.

One of the most important developments in American politics over the last 40 years has been the rise of negative partisanship—the phenomenon whereby Americans largely align against one party instead of affiliating with the other. Though it has the power to reshape patterns of political behavior, little is known about the microfoundations driving negative partisanship. In this article, we show how the growing racial divide between the two major parties, as well as the presence of partisan‐friendly media outlets, have led to the rise of negative partisanship. We also utilize the growing literature on personality and politics to show how the Big Five personality traits are predictive of negative partisanship. The results suggest that the psychological roots of negative partisanship are both widespread and, absent drastic individual and structural‐level changes, likely to persist.

Political preferences in the United States are highly correlated with population density, at national, state, and metropolitan-area scales. Using new data from voter registration records, we assess the extent to which this pattern can be explained by geographic mobility. We find that the revealed preferences of voters who move from one residence to another correlate with partisan affiliation, though voters appear to be sorting on non-political neighborhood attributes that covary with partisan preferences rather than explicitly seeking politically congruent neighbors. But, critically, we demonstrate through a simulation study that the estimated partisan bias in moving choices is on the order of five times too small to sustain the current geographic polarization of preferences. We conclude that location must have some influence on political preference, rather than the other way around, and provide evidence in support of this theory.

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