Up until Grover Cleveland, presidents arrived at the ceremony with the assumption a Bible would be provided for them. It’s since become common for presidents to use their family Bibles. Hoover, FDR, Nixon, Reagan and Clinton used family bibles. Richard M. Nixon used two Bibles dated 1928 and 1873 , which were family heirlooms
The George Washington Bible, which Washington had hastily borrowed from the St John’s Masonic Lodge, has been used for the inaugurations of Warren G. Harding, Dwight D. Eisenhower, Jimmy Carter, and George H.W. Bush. Both Carter and Eisenhower used two bibles, the George Washington Bible as well their own.
John Quincy Adams swore on a book of law.
Theodore Roosevelt was the only President not sworn in on a Bible. but was sworn in with uplifted hand.
John F. Kennedy as the first Catholic elected president was the first to use a Catholic (Douay) version of the Bible for his oath.
The Wall Street Journal has a nice interactive piece on previous Presidential bibles and passages.
I recognize these guys are all Christians at least publicly, so what they swear on is their own choice. But I hope I live long enough to see someone swear on something universal, say…the Constitution.
PS: From Wikianswers:
What bible did Joseph Biden use for his oath?
The ornate, five-inch-thick Bible with a Celtic cross has been in Biden’s family since 1893, according to Sen. Tom Carper, D-Del. Biden has used the Bible each time he’s been sworn in, as did his son Beau when he was sworn in as Delaware’s attorney general.