Lee is jointly appointed in the Department of Politics and the Princeton School of Public and International Affairs where she is Professor of Politics and Public Affairs. Lee has broad interests in American politics, with a special focus on congressional politics, national policymaking, party politics, and representation. She is coauthor of In Covid’s Wake: How Our Politics Failed Us (2025), Sizing Up the Senate: The Unequal Consequences of Equal Representation (1999) and the textbook Congress and Its Members (Sage / CQ Press).