Daniel J. Hopkins is a Professor in the Department of Political Science at the University of Pennsylvania, and has a courtesy appointment at the Annenberg School of Communication. Professor Hopkins’ research addresses a variety of questions related to American political behavior and policymaking. In particular, he studies how citizens and voters understand politics and public policy as well as their political and policy-relevant behaviors. His work pays special attention to immigration and health care as well as voting behavior and federalism. He is the author of 40 articles as well as the 2018 book “The Increasingly United States.” Among other topics, his research has examined the role of media framing in shaping attitudes toward the Affordable Care Act. In 2015, he served on the U.S. federal government’s Social and Behavioral Sciences Team, where he assisted in the analysis of an experiment testing different messages to shoppers on the federal health insurance exchange. He received his Ph.D. from Harvard University in 2007, and is an occasional writer for FiveThirtyEight.com and for The Monkey Cage at the Washington Post.