Using a regression discontinuity design, we show that personal experience with public health insurance programs exerts a causal influence on attitudes toward both Medicare and the Affordable Care Act. However, we argue that the conditional dynamics of these policy feedback effects differ from standard models of opinion formation and change. Specifically, we find that personal experience can shape preferences among those whose partisanship might otherwise make them resistant to elite messaging; in the case of support for health policy, we find effects of public programs are most pronounced among Republicans. In addition, we find that the effects of personal experience, unlike attempts to shape attitudes through elite political messaging, are concentrated among low-information voters who might otherwise not be attuned to the political environment.