According to wikipedia https://en.wikipedia.org/wiki/Lyndon_B._Johnson#Senate_Democratic_leader LBJ suffered a nearly fatal heart attack in 1955. What if instead of narrowly surviving and quitting smoking he died that day? How would us politics change as a result? Who would be the new senate majority leader in his place? Who would become VP to JFK or for that matter would JFK even win the nomination? Discuss.