I am Director of Data Science at the Program for Opinion Research and Election Studies at the University of Pennsylvania. I am also an elections analyst at the NBC News Decision Desk. Beginning in September 2025, I will move to the Hoover Institution at Stanford University, where I will be a Hoover Fellow.

My research primarily focuses on the formation and realignment of political coalitions in the United States. I am particularly interested in understanding how structural economic change, political geography, and social arrangements influence political attitudes and behavior. In ongoing work, I address these questions in the context of the political realignment across educational attainment levels. In my methodological work, I develop methods to understand elections, to connect theory to measurement, and to improve measurement of public opinion using increasingly non-representative survey data.

My research is published in journals including the American Political Science Review, the Journal of Politics, Political Science Research and Methods, and Political Analysis. My work has been covered in major news outlets such as the New York Times, the The Washington Post, the Economist, the Atlantic, and others.

At Penn, I have taught undergraduate courses on survey research methods, data science, and political geography, and a graduate course on American political institutions.

Previously, I was a postdoctoral fellow at Princeton’s Center for the Study of Democratic Politics. I received my Ph.D. in political science from Stanford University and my undergraduate degree from the University of Pennsylvania.