His political career began when he was elected (1910) to the New York state senate. He became the leader of a group of insurgent Democrats who prevented the Tammany candidate, William F. Sheehan, from being chosen for the U.S. Senate. Roosevelt allied himself firmly with reform elements in the party by his vigorous campaign for Woodrow Wilson in the election of 1912. Appointed Assistant Secretary of the Navy, he served in that position from 1913 to 1920 and acquired a reputation as an able administrator. In 1920 he ran as vice presidential nominee with James M. Cox on the Democratic ticket that lost overwhelmingly to Warren Harding and Calvin Coolidge.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.