[Nonstatist]

Crap! FDR did not have an IQ as high as 130, and Kennedy was nowhere near 140. What nonsense!

[Labyrinthos]

And Jimmy Carter was at 121.7? Although Carter was and remains one of the most ineffective executives and biggest losers ever to occupy the White House, even his most harshest critics will admit that he had more brain power than that.

[RightWhale]

FDR did not have an IQ as high as 130, and Kennedy was nowhere near 140. What nonsense!

These are probably good estimates.

One thing about the lack of 3 sigmas among presidents: unlike a monarch, the president must get along with everyone. Most multi-sigmas get along with no one, so a president such as Bill Clinton would [thank you, Lord] be a rarity.