Only four U.S. presidents have ever received the Nobel Peace Prize: Theodore Roosevelt (1906), Woodrow Wilson (1919), Jimmy Carter (2002), and Barack Obama (2009). And all of them received the prize f...

Only four U.S. presidents have ever received the Nobel Peace Prize: Theodore Roosevelt (1906), Woodrow Wilson (1919), Jimmy Carter (2002), and Barack Obama (2009). And all of them received the prize f...