After Backward Baby Bush left office, psychiatrists came out of the woodwork to let us know that he had what is known as "presenile dementia." Just plumb YouTube for his speeches and interviews as Governor of Texas. He was quick, clever and smart, not the bozo who several years later couldn't remember the nursery rhyme, "Fool me once... shame on... shame on... me ... Fool me twice... shame on... shame on... Won't get fooled again!"
Ever since the Kennedy assassination, every presidential candidate has very carefully chosen a running mate who was pleasant and affable, but whom no one would ever want to see in the White House. This is a deterrent to assassination... the presidency of the USA is the most dangerous job on earth: 10% of the people who have held the office have been assassinated.
So even the people who realized that Bush was an
actual idiot were reluctant to impeach him or simply call for his removal on medical grounds. There was a two-word phrase that struck fear into the heart of every American: "President Cheney." We wised up to that issue in 2008 by not electing McCain, who even we liberals agreed would have been a damn good President, even if he was white.

But he was an old man with lots of health problems stemming from his mistreatment in that Viet Cong P.O.W. camp. He might very well have conked out from the pressure of the Oval Office. And, once again, there was that utterly frightening two-word phrase: "President Palin."