I ___, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all ... discharge the duties of the office on which I am about to enter.

and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice.

WASHINGTON — On January 20, Donald Trump will take the oath of office for his second, non-consecutive term as President of the United States. During the ceremony, Supreme Court Chief Justice ...