The president is said to rage when things do not go his way. This kind of pressure on the circulatory systems expands the arteries, loosening the cholesterol already packed into. The surface become less smooth, with more places for new sticky cholesterol to lodge. This closes up the arteries and leaves the occupant ripe for heart attack.
At the very least, one who is under heavy pressure would do well to bring his weight, BMI, in under a rating of obesity. And exercise is essential to keep the heart muscle healthy. So, when the president eats hamburgers or a well done steak slathered with roquefort dressing, gravy, and big dollops of ice cream for dessert, he is asking for an early retirement, not a 2020 re-election.