IMHO, IQ tests do not measure real smarts. There are other factors where we can not assign a number. BTW --- Nixon's IQ was probably off the charts. Did he have problems because the Democrats "couldn't understand him"?
The IQ tests measures how good someone is at taking IQ tests.
Years ago I was taught that there is a difference, in some people a huge difference, between ‘intelligence’ or ‘smarts’ as measured by standard questions about ordinary life occurrences and ‘wisdom’. Wisdom being the result of being able to translate intelligence to necessary aspects of human life. I believe the Founders for the most had such wisdom in forming the USA. Lincoln apparently had both and I tend to believe that Reagan also had both.