- Woodrow Wilson: A Biography (2009)
- Breaking the Heart of the World: Woodrow Wilson and the Fight for the League of Nations (2001)
- The Warrior and the Priest: Woodrow Wilson and Theodore Roosevelt (1983)
Public Policy Scholar, 2007-2008, "This Man's Life." A Biography of Woodrow Wilson Senior Scholar, 2010-2016, " The American Century, 1845-1945"