C'est un vrai probleme dans ce cas la:
28 U.S. Code Chapter 21 - GENERAL PROVISIONS APPLICABLE TO COURTS AND JUDGES,
28 U.S. Code § 453 - Oaths of justices and judges:
"Each justice or judge of the United States shall take the following oath or affirmation before performing the duties of his office: “I, ___ ___, do solemnly swear (or affirm) that I will administer justice without respect to persons, and do equal right to the poor and to the rich, and that I will faithfully and impartially discharge and perform all the duties incumbent upon me as ___ under the Constitution and laws of the United States.
So help me God.”
https://www.law.cornell.edu/uscode/text/28/453