Theodore Roosdevelt: 26th President of the United States (1901-1909) Theodore Roosevelt was an energetic and dynamic leader who gave the nation a square deal. During his presidency to a position of internatio nal leadership. Roosevelt belonged to an aristocratic New York family. He attended Harvard Univerity. Theodore Roosevelt fought in the Spanish-American war with the Rough Riders at the battle of San Juan Hill. He had served as police commissiores of New York, assistant secretary of the navy, governor of New York, and vice president of the United States. When president McKinley was assassinated on Se