Despite being shown as a handsome, healthy man, John F Kennedy suffered from some serious health issues like Addison's Disease. Were he not killed there's a good chance he'd die in office anyway, and if people knew about his illnesses its unlikely he'd become president. So let's say people find out right as he's starting and loses his shot, and he's not settle for second banana. Instead Lyndon B Johnson gets the Democratic nomination
If LBJ is chosen, who do you think would be his running mate? And more importantly, who'd win in the 1960 election-him or Richard Nixon? And out of curiosity, do you think Oswald would assassinate either like he did with OTL JFK?