My research focuses on how citizens and policymakers form their factual beliefs in politics. In particular, I am interested in the "politics of expertise", i.e., the conditions under which different types of policy-relevant experts succeed or fail to influence policy decisions. I employ a variety of methods, with an emphasis on survey methods and survey experiments. I also have a range of other interests including candidate emergence, energy and environmental policy, interest-group lobbying, and the politics of regulation. In addition, I am also the founder and managing director of the CivicPulse (civicpulse.org), an open-access survey panel of government officials around the United States.