Each president recites the following oath, in accordance with Article II, Section I of the U.S. Constitution:
The oath or affirmation is typically administered by the Chief Justice, but sometimes by another federal or state judge. Incoming Presidents raise their right hand and hold the other on a Bible or other book while taking the oath of office.
Franklin Pierce was the first president to use the word affirm rather than swear. Theodore Roosevelt did not use a Bible when taking the oath in 1901. Dwight Eisenhower, Harry Truman, and Richard Nixon swore the oath on two Bibles. John Quincy Adams supposedly swore on a book of law. Lyndon B. Johnson was sworn in on a Roman Catholic book of service on Air Force One.
Sarah T. Hughes is the only woman to administer the oath of office. A U.S. District Court judge, Hughes swore Lyndon B. Johnson into office on Air Force One after Kennedy's assassination.