Official's Oath of Office

Article II, Section 1 dictates the President take the following oath of office:

"I do solemnly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my Ability, preserve, protect and defend the Constitution of the United States."

The Constitution specifies in Article VI, clause 3:

"The Senators and Representatives before mentioned, and the members of the several state legislatures, and all executive and judicial officers, both of the United States and of the several states, shall be bound by oath or affirmation, to support this Constitution; but no religious test shall ever be required as a qualification to any office or public trust under the United States."

In 1789, the First United States Congress reworked the constitutional requirement into a simple fourteen-word oath:

"I do solemnly swear (or affirm) that I will support the Constitution of the United States."

First United States Congress passed the Judiciary Act of 1789, which established an additional oath to be taken by Supreme Court justices and district court judges:

"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 on me, according to the best of my abilities and understanding, agreeably to the Constitution, and laws of the United States. So help me God."

in the 1860s the following oath drafted during Lincoln's War to ensnaring traitors was established.  The Vice President, members of the Cabinet, Congresspersons, Senators and all other civil and military officers and federal employees recite the oath:

"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."

In April of 1861 President Abraham Lincoln ordered all federal civilian employees within the executive branch to take an expanded oath. In July of 1981, Congress enacting legislation requiring employees to take the expanded oath in support of the Union.

The following oath is taken by all New York government officials:

"I solemnly swear (or affirm) that I will support the Constitution of the United States, and the Constitution of the State of New York, (and the Charter of the City of New York, e.g.), and that I will faithfully discharge the duties of the office of (mayor of the City of New York, e.g.) to the best of my ability. (So help me God is traditionally added.)"

Federal judges are required to take two oaths:

"I, XXX XXX, 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 XXX under the Constitution and laws of the United States. So help me God."

"I, AB, 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."