FDR and JFK were both presidents of the United States. FDR, or Franklin Delano Roosevelt, was the 32nd president of the United States and served from 1933 to 1945. He was a Democrat and was the only president to be elected to four terms. JFK, or John F. Kennedy, was the 35th president of the United States and served from 1961 to 1963. He was also a Democrat. The crossword solutions for FDR and JFK are PRES (4 letters) and DEM (3 letters), respectively.