Theodore “Teddy” Roosevelt (October 27, 1858 – January 6, 1919) was the 26th President of the United States (1901–1909). He is noted for his energetic personality, range of interests and achievements, leadership of the Progressive Movement, and his “cowboy” image and robust masculinity. He was a leader of the Republican Party and founder of the short-lived Progressive (“Bull Moose”) Party of 1912. Before becoming President, he held offices at the municipal, state, and federal level of government. Roosevelt’s achievements as a naturalist, explorer, hunter, author, and soldier are as much a part of his fame as any office he held as a politician.