Superlative
Franklin Roosevelt
The individuals that served the longest in the executive office of the president are a number. There many who served two full terms but Franklin Roosevelt is the one who served the longest as he managed to stay in office for three full terms.
Franklin Roosevelt was the first president to rule hold the presidents office for more than 2 terms; this was a tradition among American presidents but after his reign it was made into a law
Franklin D. Roosevelt and Harry S Truman.
As of 2014, there have been four US Presidents that have died in office of natural causes. The presidents include William Henry Harrison, Zachary Taylor, Warren G. Harding, and Franklin D. Roosevelt.
There were just two men who held the office of president that were named Franklin. They were Franklin Delano Roosevelt who was the 32nd president and Franklin Pierce who was the 14th.
Franklin D. Roosevelt's 2nd term of the Presidency was from 1936 to 1941. Franklin D. Roosevelt is one of the only Presidents of the United States to be in office for a total of 12 years from 1933 to 1945.
Franklin Roosevelt
Franklin Roosevelt was the only one to serve more than two terms and will remain the only one unless the Constitution is changed.
William Harrison, Zachary Taylor, Warren Harding, Franklin Delano Roosevelt
*Franklin D. Roosevelt was President when the USA formally entered WW 2 on December 7, 1941, after Japan's attack on Pearl Harbor. Roosevelt died, while in office, on April 12, 1945. *Vice-President Harry S Truman succeeded to the Presidency and held office when Japan surrendered to end WW 2 on August 15, 1945 (V-J Day).
President Franklin D. Roosevelt served 12 years in office.