In 1992, Vice President Dan Quayle officiated a spelling bee. A student was asked to spell, "potato." The student spelled the word correctly, but Quayle encouraged the student to add a superfluous e to the end. Quayle later explained that the card provided by the school spelled the word incorrectly, and he didn't think it was correct, but he deferred to the card. It was a Moors/Moops kind of thing. Still, Quayle already had a reputation as being not-too-bright, and that just solidified it. He couldn't spell "potato." He was a... fucking moron (hat tip to Rex Tillerson). For what it's worth, Richard Fenno wrote a book about Quayle. Fenno didn't think that Quayle was the absolute smartest guy around, but Dan came across as nowhere near that dumb in the book, and as a general rule, trust Fenno's judgment. Of course, we still joke about "potatoe."
Trump has now referred to Corker as "Liddle [sp] Bob Corker," as in, "Little Marco."
Remember, Quayle was reading off of a card provided to him, and that still killed what remained of his public reputation, and Trump is bragging about his IQ this very same week.
There has to be some lesson here somewhere. Or, maybe not.