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).
Walter J. Oleszek is a senior specialist in the legislative process at the Congressional Research Service. He has served as either a full-time professional staff aide or consultant to every major House and Senate congressional reorganization effort beginning with passage of the Legislative Reorganization Act of 1970. In 1993 he served as Policy Director of the Joint Committee on the Organization of Congress. A longtime adjunct faculty member at American University, Oleszek is a frequent lecturer to various academic, governmental, and business groups. He is the author or co-author of several books, including Congress and Its Members , 13th ed. (2011), and Congress under Fire: Reform Politics and the Republican Majority , with C. Lawrence Evans (1997).