When the Church Votes Left: How Progressive Bishops Supported the Workers’ Party in Brazil

Guadalupe Tuñón

American Political Science Review, 2026, vol. 120, issue 3, _18

Abstract: Social scientists routinely characterize religious influence in electoral politics as conservative and left-wing parties as fundamentally secular. Against these claims, I argue that the relationship between religion and electoral politics is shaped by the redistributive beliefs and preferences of religious leaders, who can become valuable allies of left-wing parties. I evaluate this argument in Brazil following the appointment of Pope John Paul II, leveraging as-if random variation in municipalities’ exposure to progressive Catholic bishops. I show that bishops who actively supported state-led redistribution were essential to the electoral success of the left-wing Workers’ Party (Partido dos Trabalhadores [PT]). Voters in municipalities with longer exposure to these bishops supported the PT at higher rates. The findings highlight the under-examined role of religious leaders in shaping the electoral influence of religion and provide evidence that these leaders can, in fact, be key for the development of left-wing parties, especially in the developing world.

Date: 2026
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