The persistence of cross-cutting discussion in a politicized public sphere

Although studies of Americans' general discussant networks have been repeated over time, research that assesses change in the nature of Americans' <i>political</i> discussion networks has yet to be conducted in nationally representative probability surveys. In this study I answer two questions about the quality of the American public sphere that have generated widespread speculation, but little evidence to date. First, how have Americans' political discussion networks changed over the past 25 y? Second, are the consequences of these changes what one would expect based on previous theory linking Americans' interpersonal information environments to political tolerance and political participation? I resolve competing claims suggesting that people feel less free to discuss politics, with claims suggesting instead that political discussion now permeates everyday life to a greater extent than in the past. Findings suggest widespread increases in political discussion, changes driven almost entirely by increases in like-minded political discussion partners. Surprisingly, Americans are no more or less likely to engage in conversations across lines of political difference. The predicted consequences of these fluctuations confirm an intrinsic tension between characteristics valued in democratic citizens. Political tolerance has declined significantly, along with decreased awareness of rationales for others' relative to one's own views. Political participation is significantly higher on average than 25 y ago. Few people reported engaging with online political discussants, despite efforts to make sure they were included in network measures.