What are the effects of campaigns of coercive social mobilization on political attitudes? We show that such policies can strengthen authoritarian regimes by altering citizens’ patterns of trust. From 1968 to 1978, 16–17 million Chinese teenagers were “sent-down” to labor in rural areas, where they lived without their families under difficult conditions. Using a regression discontinuity design to account for selection into being sent-down, we show that former sent-down students are more critical of local government performance compared to their counterparts, yet they are less critical of the national government and generally more supportive of the regime. We see no significant differences in political participation, though there is some suggestive evidence that the sent-down students are more likely to favor officially sanctioned political activities. These results appear to stem from the close social control and isolation from family associated with the sent-down experience.