Jack Ryan is a fictional character created by Tom Clancy used in his Ryanverse novels. Jack Ryan was a former U.S. Marine turned History professor who ends up as the President of the United States for two terms! There are a series of Jack Ryan movies you can find such as Patriot Games, Red Rabbit, and Clear and Present Danger. This character has been played by a variety of great actors like Alec Baldwin and Harrison Ford, but is most recently portrayed by John Krasinski. This character created by Tom Clancy has such a detailed political history you would almost think he was in fact non-fiction.