Kennedy doesn't figure out what he wants to do and where he's going in life really until he gets reelected to the Senate in 1958. And he writes the book Profiles in Courage where you get to see his political and ideology emerge. As a Cold War Liberal Democrat who sees communism as the biggest threat to freedom and even mankind. As well as someone who wants to use a limited government to empower people in need to get themselves up and live well in life. Kennedy, wasn't a Conservative that today's right-wingers want to portray him as, or a Social Democrat that had a government program to solve everyone's problems for them. That today's so-called Progressives want to see him as.
By the time Jack Kennedy completed his first term in the Senate and decided that he wanted to be President of the United States is where he got serious as a public servant and political leader. That communism needed to be defeated and that freedom needed to be expanded at home. For Americans who were struggling and living in poverty, but also for Americans who were simply denied access in America because of their race and color. Which is just one reason why JFK being assassinated at the age of 46 in 1963 is so tragic. Because the great liberal Jack Kennedy as a political leader was just emerging. He probably gets reelected fairly easily in 1964 against Senator Barry Goldwater. And I think we would have seen one of the best American leaders of all-time.