The assassination saved his presidency, in the same way that the iceberg saved Leonardo and Kate’s romance in Titanic.
His presidency was going to break up once the boat docked and he realised being poor sucks?
Had his term run its course, he’d be known as just another sleazy shitheel politician with a string of scandals. Instead, he is forever the golden boy of Camelot, the all-too-brief new dawn of an American midcentury optimism, and a contrast to those that followed. The name Fitzgerald Kennedy evokes this idea of a return to a golden age, with catastrophic recent results.