How did we go from John F. Kennedy declaring that religion should play no role in the elections to Bush saying, "I believe that God wants me to be president"? Historian Randall Balmer takes us on a tour of presidential religiosity in the last half of the twentieth century-from Kennedy's 1960 speech that proposed an almost absolute wall between American political and religious life to the soft religiosity of Lyndon B. Johnson's Great Society; from...