From a New York Times essay by Frank Bruni headlined “Trump Is Really Old, Too”:

To our intensifying discussion about whether President Biden has grown mentally fuzzy and too old for a second term, I’d like to add this question: How would we even notice Donald Trump’s lapse into incoherence, when derangement is essentially his brand?

Pretty much any interview he gives is a babble bonanza, and his recent lovefest with Tucker Carlson was no exception. He went on wacky tangents, including one about the wages of building the Panama Canal: “We lost 35,000 people to the mosquito. Malaria. We lost 35,000 people. We lost 35,000 people because of the mosquito. Vicious. They had to build under nets. It was one of the true great wonders of the world.”