By Justin Sink
Roberts's selection hardly comes as a surprise — chief justices have customarily preformed the role, dating back to Oliver Ellsworth's swearing-in of President John Adams in 1797 — although it is not constitutionally mandated, and presidents are allowed to select who administers the oath. President Lyndon Johnson, for instance, took the oath from federal judge and family friend Sarah Hughes following President Kennedy's assassination in Dallas.
During that ceremony, Roberts asked the president if he was ready to be sworn in for a second time, earning a snappy quip from Obama.
"I am, and we're going to do it very slowly," Obama said.