Roger H. Davidson is professor emeritus of government and politics at the University of Maryland, and has served as visiting professor of political science at the University of California, Santa Barbara. He is a Fellow of the National Academy of Public Administration. During the 2001-2002 academic year, he served as the John Marshall Chair in political science at the University of Debrecen, Hungary. His books include Remaking Congress: Change and Stability in the 1990's, co-edited with James A. Thurber (1995), and Understanding the Presidency, Seventh Edition, co-edited with James P. Pfiffner (2012). Davidson is co-editor with Donald C. Bacon and Morton Keller of The Encyclopedia of the United States Congress (1995).