Social influence is ubiquitous in politics andonline social media. Here we explore howsocial signals from partisan crowds influencepeople’s evaluations of political news. For ex-ample, are liberals easily persuaded by a lib-eral crowd, while resisting the influence ofconservative crowds? We designed a large-scale online experiment (N=1,000) to test howpolitically-annotated social signals affect par-ticipants’ opinions. In times rife with misin-formation and polarization, our findings areoptimistic: the mechanism of social influenceworks across political lines, that is, liberalsare reliably influenced by majority-Republicancrowds and vice versa. At the same time, wereplicate findings showing that people are in-clined to discard news claims that are incon-sistent with their political views. Consideringthat people show negative reactions to politi-cally dissonant news but not to social signalsthat oppose their views, we point to the possi-bility of depolarizing social rating systems.