Associated Press
FILE - In this Sunday, Jan. 20, 2013 file photo, Vice President Joe Biden, left, places his hand on the Biden family Bible held by his wife, Jill Biden, center, as he takes the oath of office from Supreme Court Justice Sonia Sotomayor, right, during an official ceremony at the Naval Observatory in Washington. While many presidents have used Bibles for their inaugurations, the Constitution does not require the use of a specific text and specifies only the wording of presidentâs oath. That wording also doesnât include the phrase âso help me God,â but every modern president has appended it to their oaths and most have chosen symbolically resonant Bibles for their inaugurations. (AP Photo/Carolyn Kaster)