Allan J. Lichtman is a professor of history at American University in Washington, D.C. His six books include Prejudice and the Old Politics: The Presidential Election of 1928 and The Keys to the White House. His latest book is White Protestant Nation: The Rise of the American Conservative Movement. He's provided commentary for all major television and radio networks and is regularly quoted by leading newspapers and magazines worldwide. He has published more than 150 scholarly and popular articles and served as an expert witness in more than 75 federal voting rights and redistricting cases. As an expert for the U.S. Commission on Civil Rights he discovered that the outcome of the 2000 presidential election turned on the vast disparity in rates at which officials rejected ballots cast by blacks and whites in Florida.