A large body of literature indicates that partisan-motivated reasoning drives resistance to political persuasion. But recent scholarship has challenged this view, suggesting that people don’t always resist uncongenial information, and even when they do, it is not clear why. In this article, I present two survey experiments that examine when and why partisans selectively dismiss uncongenial information. The findings show that, in the absence of affective triggers, partisans were persuaded by both congenial and uncongenial information. But when randomly induced to feel adversarial, they became more dismissive of uncongenial information and ultimately disagreed more, not less, after considering the same information. These results (1) identify a crucial condition that provokes resistance to political persuasion; (2) demonstrate partisan-motivated reasoning more clearly than previous studies; and (3) underscore the importance of the quality of elite-level political discourse in determining the quality of citizen-level opinion formation.
