Theodore Roosevelt’s Domestic Accomplishments As President Theodore Roosevelt was the father of six children Theodore Roosevelt was the 26 th President of the United States, he was also an assemblyman of New York, and the governor that same state. Vice of America President of the United States of America. Roosevelt was also a deputy sheriff of the Dakota Territory, a New York police commissioner, and U.S. civil service commissioner, assistant secretary of the Navy, and Colonel of the rough Riders. Theodore Roosevelt became the youngest president at the age of 42. In 1933 he stayed in office until 1945. Roosevelt won the election with t