“They are going to claim that Donald Trump has Alzheimer’s and that it is progressive and that is the source of his insanity,” Mr. Stonesaid. “I have talked to the president fairly recently. He is as sharp as a tack. There is no evidence of any deterioration in his thought process. “This is completely bogus, but under the 25th Amendment, if a majority of the Cabinet, plus the vice president, agree that the president is incapacitated, well then, he is removed, and if he seeks to fight the charges, it goes to the U.S. House of Representatives, where erosion among Republicans could destroy the Trump presidency,” Mr. Stone added.