There's an article in NY Times today entitled "Harry Truman, Five-Card Stud, and the Cold War." Talks about U.S. presidents, their interest in poker, and how poker might have informed some of their political strategies. Article is by Michael Beschloss.
http://www.nytimes.com/2014/09/20/upshot/harry-truman-five-card-stud-and-the-cold-war.html