Selective Exposure and New Political Cleavages: Media Use and Ideological Reinforcement Over Time

New political cleavages are reshaping the political landscape in established democracies. The classic left-right ideological dimension that has structured politics for decades is increasingly challenged by a sociocultural value dimension. At the same time, growing opportunities for media choice open for new forms of selective news exposure along political lines. We argue that previous research has too narrowly focused on traditional ideological cleavages, neglecting the increasingly important sociocultural value dimension of politics. Using four waves of panel survey data collected in Sweden during 2020 and 2021, this study analyses ideological selective exposure, audience composition, and reinforcing spirals across a range of mainstream and alternative news outlets. Findings show (1) that the sociocultural value dimension is more important than the socioeconomic dimension for explaining news choices, (2) that it structures news audiences in uniquely distinct ways, and (3) that these relationships are highly stable over time—reflecting patterns of de facto selective exposure and ideological maintenance, rather than reinforcement. These findings bring new insights to research on selective news exposure, political polarization, and changing ideological cleavages in Western democracies.