David Karol is associate professor of American Politics in the Department of Government and Politics at the University of Maryland where he studies and teaches parties, interest groups, political institutions and American political development. He previously taught at American University, U.C. Berkeley, and the U.C. Washington Center. He is author of Party Position Change in American Politics: Coalition Management (Cambridge University Press, 2009); a coauthor of The Party Decides: Presidential Nominations Before and After Reform (University of Chicago Press, 2008); and coeditor of Nominating the President: Evolution and Revolution in 2008 and Beyond (Rowman and Littlefield, 2009). He earned a B.A. degree from Grinnell College, an M.A. degree from Iowa State University, and a Ph.D. degree from the University of California, Los Angeles.