Contemporary U.S. political discourse is distorted by “epistemic bubbles.” In social epistemology, an epistemic bubble is a self-segregated network for the circulation of ideas, resistant to correcting false beliefs. Dominant models of epistemic bubbles explain some of their features, but fail to account for their recent spread, increasing extremity, and asymmetrical distribution across political groups. The rise of populist authoritarian politics explains these recent changes. I propose two models of how populism creates epistemic bubbles or their functional equivalents: (1) by promulgating biased group norms of information processing; and (2) by replacing empirically-oriented policy discourse with an identity-expressive discourse of group status competition. Each model recommends different strategies for popping epistemic bubbles. My analysis suggests that social epistemology needs to get more social, by modeling cognitive biases as operating collectively and outside people’s heads, via group epistemic and discursive norms.