The one who surprised me was Cheney. In 1978, he had his first heart attack. They told him he would have a few more years of life. He has had five heart attacks over the last 47 years, is 84 years old, and somewhat alive.
Cheney has a whole lot of money, and social status, so they have done everything they can to keep him alive. Doctors have done everything they can do to a heart, including replacing it with a new one.
So far, trump has the same as Cheney. Cheney has one advantage, he has the common sense to listen to the doctors. The doctors told him to stop smoking, he stopped smoking. The doctors told him to stop eating so much meat, he stopped eating so much meat. Doctors told him he needed surgery, he got the surgery.
What will kill trump is he does not listen.