John Barry Ryan’s research agenda is centered on political communication with a focus on campaign communication, social influence, and the news media. His latest co-authored books and monographs are Partisan Hostility and American Democracy: Explaining Political Divisions and When They Matter (University of Chicago Press), Constructing Political Expertise in the News (Cambridge University Press), Examining Motivations in Interpersonal Communication Experiments (Cambridge University Press), and The Other Divide: Polarization and Disengagement in American Politics (Cambridge University Press). His reseach has appeared in journals such as American Journal of Political Science, American Political Science Review, The Journal of Politics, Nature Human Behavior, and Public Opinion Quarterly.