James I. Wallner is a senior fellow at the R Street Institute, where he is a member of its Governance Project team and Legislative Branch Capacity Working Group. He is also an Adjunct Professor in the Department of Government at American University and in the Department of Politics and the Congressional and Presidential Studies Program at the Catholic University of America.

James is the author of two books, The Death of Deliberation: Partisanship and Polarization in the United States Senate, published in 2013 by Lexington Books and On Parliamentary War: Partisan Conflict and Procedural Change in the United States Senate, published in 2017 by the University of Michigan Press.

James has published articles on the American founding, separation of powers, Congress, parliamentary procedure, and the budget process in the Journal of Policy History, Journal of Legislative Studies, Journal of Law and Politics, Humanitas, and The Forum: A Journal of Applied Research in Contemporary Politics. He is also a regular contributor with the Washington Examiner, The Federalist, and the Online Library of Law and Liberty's Liberty Law Blog

Prior to joining R Street, James was the Group Vice President for Research at The Heritage Foundation, where he created the Institute for Constitutional Government. Before Heritage, Wallner was the Executive Director of the Senate Steering Committee during the chairmanships of Pat Toomey and Mike Lee. Prior to this, he served as Legislative Director to Jeff Sessions and Pat Toomey. He began his career on Capitol Hill as a Legislative Assistant in the House of Representatives.

James received both his doctoral and master’s degrees in politics from the Catholic University of America. He also holds a master’s in international and European politics from the University of Edinburgh in Scotland, and a bachelor’s in political science from the University of Georgia.

The qualities I always admired most in James are his deep and abiding love for this country, for its history, its people, and its institutions, and his uncompromising commitment to the self-evident truths upon which it was founded and the truths built into our governing document, the U.S. Constitution.
— Senator Mike Lee