By convention, incoming Presidents raise their right hand and place the left on a Bible or other book while taking the oath of office. In 1789, George Washington took the oath of office with an altar Bible borrowed from the St. John's Lodge No. 1, Ancient York Masons lodge in New York and he kissed the Bible afterward.[Subsequent presidents up to and including Harry Truman, followed suit. Dwight Eisenhower broke that tradition in 1953 when he said a prayer instead of kissing the Bible.

 Harry Truman, Dwight Eisenhower, Richard Nixon, and Barack Obama each swore the oath on two Bibles.

Separation church and state.....Sure about that ?