Yes, Trump used to be well-spoken. His dementia has reduced his speech to that of a grade schooler.

Trump won the election because of 2 things: the economy and Harris poor campaign. Neither one of those makes him smart.

If you want a measure of his intelligence, look at his career in real estate. He was so bad at it that he was the laughing stock of the NYC real estate scene. He was so bad at it, that American and European banks wouldn't lend to him. Only the Russians would lend to him. And that was because they were cultivating him as an asset. Oh, and you know how Trump brags about going to Wharton? His professor there said Trump was the stupidest student he ever had.

The only reason why Trump is not broke and living under a bridge is because of The Apprentice. He was literally down to his last million or less when the producers came calling with cold hard cash.