He was the 32nd President of the United States elected four times as President. He ran for Senator in the new York state legislature from the Democratic party and won.
In 1913-1920, he was assistant Secretary of the Navy in the administration of President Woodrow Wilson.
In 1914, unsuccessfully tried to obtain the position of Senator in the Congress of the United States.
In the summer of 1921, during a vacation at Campobello island in Canada, Roosevelt contracted polio. Despite all attempts to defeat the disease, he remained paralyzed and moved in a wheelchair. All its main achievements fall on this period.
He developed measures to overcome the consequences of the great depression, established diplomatic relations with the Soviet Union, decided to participate in the U.S. anti-Hitler coalition.