Robert Kennedy, JFK's brother, was also assassinated when he was running for president. He too would have changed the course of our history.
Here's a link to a clip of one of the most remarkable moments in our history as a nation...Robert Kennedy had just received news of Martin Luther King Jr's assassination and, well....
https://www.youtube.com/watch?v=j6mxL2cqxrA
Hands down, one of the most beautiful and wise responses to inconceivable tragedies I've ever seen, and a valuable piece of advice in our current conflicts.