The Chief Justice of the Supreme Court is supposed to swear in president-elect of the United States. If there is no sitting Chief Justice, another member of the court would swear the president and vice-president in.

However, what if the entire court does not have any sitting members. Who swears in the president then? Ideally, the Senate would have to approve a new presidential nominee. But what if the entire court is killed in a tragic accident on their way to the new president's inauguration on the 20th of January?

  • 3
    Downvoted because the question is based on a misconception, Anyone legally authorized to take oaths can swear in the President. For instance, Lyndon Johnson was sworn in by a Texas judge after Kennedy was killed.
    – jamesqf
    Jan 25 at 3:09

Anyone who is empowered to administer federal oaths. There's no requirement that it be a member of the supreme court; that is only a tradition. In fact, after Kennedy's assassination, Johnson was sworn in by a district court judge.

  • The Constitution just says the president will take the oath. It doesn't say anything about anyone administering it. Jan 25 at 4:16
  • However oaths do need to be administered by a notary to be legal, that's not a Constitutional requirement, but a common law requirement
    – James K
    Jan 26 at 17:05

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