1. Introduction2. Theodore Roosevelt, the Panama Lobby, and Senator John Tyler Morgan: The Battle for an Isthmian Canal, 1901-19043. Woodrow Wilson versus Senator Henry Cabot Lodge: The Battle over the League of Nations, 1918-19204. Herbert Hoover, Henry Stimson, and the Collapse of the Post-World War I International Order, 1921-19335. Franklin D. Roosevelt, the State Department and the Navy: U.S. Policy toward Japan, 1937-19416. Harry S. Truman, James Byrnes and Henry Wallace: The U.S. Response to Josef Stalin, 1945-19477. Conclusion: The Art of Presidential Statecraft