Franklin D. Roosevelt was one of the best US presidents, elected 4 times. He led the country through the Great Depression and WWII. Some claim FDR knew about the Pearl Harbor attack beforehand, but there is no evidence to support this. FDR would not have allowed such a devastating attack. There are several reasons why FDR likely did not know, including that he always did his best to protect the country and was truthful. FDR helped the US recover from the Great Depression through New Deal programs and ensured national security during WWII.