US Senate (Oath or Affirmation) (Same Rule III Oaths The oaths or affirmations required by the Constitution and prescribed by law shall be taken and subscribed by each Senator, in open Senate, before entering upon his duties.) Oath Required By The Constitution And By Law To Be Taken By Senators: "I, A__ B__, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of...