Google serves up pages which claim to estimate Presidential IQs. With this thread topic and my fetish for Lists, I checked several of the lists just now. There was much variance among the lists, but the consensus seemed to show as the Top Twelve:
- JQ Adams
- Jefferson
- JFK
- Madison
- Clinton
- Carter
- Wilson
- J. Adams
- Obama
- Garfield
- Arthur
- T. Roosevelt
There is MUCH controversy about the "IQs". JFK, for example, was tested at IQ=118 as a young man, casting doubt on his high rank here.
Note that some of the "Greatest" -- Washington, Lincoln, FDR -- are missing from this Top Twelve List. Other than FDR (ranked about #13), Trump(!?) and the four shown on this Consensus Top Twelve, all Presidents since Wilson scored poorly, especially the Bushes.
Although not a candidate for "The Top Twelve", Trump was ranked about #16 by at least two lists! Here is one comment:
"I think he's our most cunning president, and I think there is a certain amount of intellect that that requires," says Perry, director of presidential studies at the University of Virginia's Miller Center. "So, maybe for some presidents, they make up for lack of native brilliance and intelligence with cleverness."
"Intelligence" is not a single-faceted attribute and it IS possible for a semi-literal sociopath with the emotional maturity of a nine year-old, and lacking all intellectual curiosity to score high in "practical intelligence"; and achieve success -- especially if the sociopath has strong talents as criminal and con-man.
The problem with Trump is not just his stupidity but the fact that he is concerned solely with day-to-day ego gratification and lacks all regard for the country or the future.