The medical report is clinical, almost cold: aortic dissection from long-advancing cardiovascular disease. But behind that sterile language is a man who drove himself at full throttle until his body finally refused to carry him any further. Graham’s father died of heart disease at 68; he pushed three years past that, on a schedule that would break most men half his age. His final hours were not spent in retirement, but in motion — returning from Ukraine, pressing the White House on legislation, still trying to shape the country’s future.