For some reason this sparked my curiosity. Of course I figured FDR was one of the three, but I couldn't come up with the third. So I called my go-to-source for all things presidential trivia related, my father. His answer—Woodrow Wilson. Mystery solved.
Of course then I wanted to know the comparable facts about Republicans. So I asked that and was supplied with the correct information as well: Theodore Roosevelt, Dwight Eisenhower and Ronald Reagan.
This has no real point or reason, it just intrigued me.