What powers did FDR expand or create?

Franklin Delano Roosevelt was President for 12 years and 39 days in four terms covering an unprecedented economic depression and a world war. The American national governmental system was drastically modernized during this period. One effect was to enhance both the formal and informal powers of the presidency by equipping the institution with new tools. Another was to give it an unprecedented presence in American living rooms as an on-site rhetorical presence. Old informal constraints upon presidential power were challenged and disregarded. The office that Harry S. Truman inherited upon FDR's death on 12 April 1945 was vastly different than the one Roosevelt assumed from Hoover on 4 March 1933.