Theodore Roosevelt Jr. (October 27, 1858 – January 6, 1919) was an American politician and statesman. He was the 26th president of the United States from 1901 to 1909. Before becoming president, he was the 25th vice president under William McKinley from March to September 1901. Roosevelt is often ranked as one of the greatest presidents in American history. He earned the Nobel Peace Prize in 1906, making him the first president &amp; American to do so, for setting the Russo-Japanese War.