No.
They do not.
They are speaking hyperbolically and bitterly. The idea that it could actually be true - that we are dealing with some real life Forrest Gump situation in which a retard builds and empire and is elected president three times - is My Little Pony stupid. It's just retarded.
You could speak to his EMOTIONAL IQ - a lay term that has no solid foundation in science but that most recognize as a thing. But to suggest that his ACTUAL IQ is low simply makes you appear a bitter fool - like those who "know him better" and "concur."
When you complain, your friends roll their eyes and your enemies smile
"Because I SAY I am" is fallacy, not science
You cannot betray me - only yourself, to me.
Who cuts off your dick is not your friend
An opinion you won't defend is not yours. It's someone else's
Humanity's Law of the Jungle: Survival NOT of the fittest, but of the tribe
When peeing in the pool, stand on the edge
If gender is not sex, why should a gender claim change what sex you shower with?