I am a Professor of Political Science at the University of California, Irvine, where I also serve as department chair. My research interests are located in comparative politics, specializing in citizenship, political identity, civic education, and democracy.  I have published five books, including  Citizenship in Hard Times: How Ordinary People Respond to Democratic Threat (Cambridge University Press, 2022), Pandemic Politics: The Deadly Toll of Partisanship in the Age of COVID (Princeton University Press, 2022), and Immigration and Membership Politics in Western Europe (Cambridge University Press, 2014). My work has also appeared in the American Political Science Review, Journal of Politics, World Politics, Comparative Political Studies, International Organization, and other journals. I invite you to read my CV for more.

My research has received support from the National Science Foundation, Russell Sage Foundation, and the Hellman Fellows Fund. My work has been recognized with several awards from sections of the American Political Science Association (APSA) and featured in major news outlets, including The New York Times, Washington Post, BBC, and NPR.

I also contribute extensive service to the discipline. I am the co-Founder and co-Series Editor of the Cambridge Elements in Migration Politics, as well co-Founder and past editor of the Oxford University Press book series, Oxford Studies in Migration and Citizenship. I serve as Chair of the European Politics & Society section of the APSA and recently completed my term as Treasurer of APSA.

I am a Senior Research Associate at the GLOBAL Citizenship Observatory (GLOBALCIT), located at the Robert Schuman Centre for Advanced Studies, European University Institute, and a research affiliate at the UC Institute on Global Conflict and Cooperation (IGCC).