Oath of office of the vice president of the United States

The oath of office of the vice president of the United States is the oath or affirmation that the vice president of the United States takes upon assuming the vice-presidency but before beginning the execution of the office. It is the same oath that members of the United States Congress and members of the president's cabinet take upon entering office.

Before the president-elect takes the oath of office on Inauguration Day, the vice president-elect will step forward on the inaugural platform and repeat the oath of office to ensure that the vice president can potentially be elevated to president if an unforeseen event (death, illness, etc.) caused the president-elect to not be able to assume the office. Although the United States Constitution—Article II, Section One, Clause 8—specifically sets forth the oath required by incoming presidents, it does not do so for incoming vice presidents. Instead, Article VI, Clause 3 provides that "all ... Officers ... of the United States ... shall be bound by Oath or Affirmation, to support this Constitution".^[1] Pursuant to Article VI, the 1st United States Congress passed the Oath Administration Act (that remains in effect) which provides that "...the said oath or affirmation ... [required by the sixth article of the Constitution of the United States] … shall be administered to [the President of the Senate]".^[2] Since 1937, Inauguration Day has been January 20 (was March 4 previously), a change brought about by the 20th amendment to the Constitution, which had been ratified four years earlier. The vice president's swearing-in ceremony also moved that year, from the Senate chamber inside the Capitol, to the presidential inaugural platform outside the building.^[3]

The oath is as follows:

I 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 evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter. So help me God.^[4]