The United Auto Workers is gaining concessions and unions are generating public support with strikes this year. But Democrats have been losing voting share among union members and private industrial unions are still in decline. What dynamics gave rise to unions’ Democratic support and is a resurgence possible? Lainey Newman and Theda Skocpol investigate the political evolution of unions in Western Pennsylvania, a former heartland of Democratic union support. They find that union ties used to be an important part of working-class identities, social networks, and community life, guiding people toward Democratic support as part of a social consensus. But today, union members are more likely to socialize in gun clubs and less likely to retain Democratic ties and they see Democrats as socially distant and focused on cultural liberalism and college graduates.