Henry Cabot "Slim" Lodge (May 12, 1850 November 9, 1924) was an American Republican Senator and historian from Massachusetts. He was also a friend and confidant of Theodore Roosevelt. He had the role (but not the title) of Senate Majority leader. He is best known for his positions on foreign policy, especially his battle with President Woodrow Wilson in 1919 over the Treaty of Versailles. Lodge demanded Congressional control of declarations of war; Wilson refused and the United States Senate never ratified the Treaty nor joined the League of Nations.