President John F. Kennedy
You have chosen President John F. Kennedy. Kennedy, a war hero, had just been elected, replacing the much loved President Dwight Eisenhower. Kennedy, unlike Eisenhower, is a Democrat. As a politician, he is a relative unknown and doesn't have the proven track record of anti-communist feelings that many in the U.S. government would hope. He is also a young father and extremely popular with the young adults and youth of America, who feel that they have a connection to the young President.
Let's hope your good looks and Princeton University wit can help you successfully navigate the Cuban Missile Crisis without killing everyone on the planet.
Good luck!