Democrat Franklin Delano Roosevelt (popularly referred to by his initials FDR) was the 32nd US President. He was President of the United States when Joseph R. Biden Jr. was born. Joe Biden is the 46th US President. The presidency of Franklin D. Roosevelt was a novelty. He was the first American to win four presidential elections in 1932, 1936, 1940 and 1944. The presidency of Joe Biden is also a novelty. He is the oldest American to be sworn in as president at 78 years in January 2021.