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This study examines the effects of geographical variations in diversity on political communication within the context of partisan media and audiences. Partisan heterogeneity, as an indicator of political diversity, was conceptualized as a geographical context of the distribution of party preferences within a county. Using a set of nationwide panel survey data with county-level statistics, we conducted multilevel modeling to test its effects on partisan news use, political discussion, knowledge, and affective polarization. The results indicate that county-level partisan heterogeneity reduced the average levels of like-minded news consumption. Moreover, it attenuated the positive relationship between like-minded news use and political talk with strong ties. Additionally, we found that the context of partisan heterogeneity significantly moderated the mediation effects of partisan news use on political knowledge and affective polarization through political discussion. Implications of these results on partisan communication were discussed.
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Lee et al. (2024) studied this question.
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