
The U.S. Constitution, Article VI, Clause 3, states that senators, representatives, state legislators, and all executive and judicial officers shall be bound by oath or affirmation to support and defend the Constitution. The current oath taken by senators is: 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. The oath has undergone several revisions since its first act by Congress, with the most recent change occurring in 1966.
| Characteristics | Values |
|---|---|
| Who takes the oath? | Senators, Representatives, State Legislatures, and all executive and judicial officers |
| What is 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." |
| Who administers the oath? | The presiding officer in an open session of the Senate |
| When is the oath taken? | At the start of each new Congress, in January of every odd-numbered year |
| How often is it taken? | Every two years, approximately one-third of the senators take the oath |
| Can senators refuse to take the oath? | No, they are bound by the U.S. Constitution, Article VI, Clause 3, to take the oath or affirmation |
| Has the oath always been the same? | No, the form of the oath has changed several times. The current version has been in use since 1966. |
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What You'll Learn

The current oath senators take
> "I do solemnly swear (or affirm) that I will support the Constitution of the United States."
The oath has undergone several revisions since the first act of Congress. Notably, during the Civil War, Congress revised the oath to bar from office anyone who had been disloyal to the Union. This version of the oath, known as the "Ironclad" oath, included additional sections and was mandated for all federal civilian employees within the executive branch.
The "Ironclad" oath was eventually dropped during revisions in 1868, 1871, and 1884, and the current version of the oath has been in place since 1966. The oath is prescribed in Title 5, Section 3331 of the United States Code and reads as follows:
> "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."
The oath is administered by the presiding officer in an open session of the Senate, and senators sign an elegantly bound oath book, a tradition that dates back to the Civil War era.
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The history of the oath
Oaths of office and allegiance have been a feature of government for centuries. When the United States were colonies of Great Britain, officials swore allegiance to the king. Colonial and state legislatures also created oaths that required members to swear allegiance to the state and often profess a belief in God as well.
In 1789, the First Congress adopted a simple oath: "I do solemnly swear (or affirm) that I will support the Constitution of the United States." This oath was used for all federal officials except the President, whose oath was prescribed specifically in the Constitution (Article II, section 1, clause 8).
During the Civil War, Congress revised the oath to bar from office anyone who had been disloyal to the Union. This new version became known as the "Ironclad Test Oath." The Test Oath required civilian and military officials to swear or affirm that they had never aided or encouraged “persons engaged in armed hostility” against the United States.
Following the Civil War, Congress permitted some former Confederates to take only the second section of the 1862 oath, and an 1868 statute prescribed this alternative oath for "any person who has participated in the late rebellion, and from whom all legal disabilities arising therefrom have been removed by act of Congress." Northerners complained that this created a double standard, as loyal Unionists were required to take the harsh first section of the Test Oath while ex-Confederates were not.
In 1884, after more than a decade of complaints, lawmakers repealed the first section of the Test Oath, leaving intact today's affirmation of constitutional allegiance. The form of the oath has changed several times since then, with the current version being used since 1966. It reads: "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."
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The role of the state in the oath
The state's role in the oath highlights the federalist nature of the United States and the importance of state governments in the overall functioning of the country. By including state officials in the oath, the founders recognized the critical role states play in upholding the Constitution and ensuring its principles are upheld at the local level. This also serves to unify the country under a shared commitment to constitutional values, regardless of geographical boundaries or state-level differences.
Historically, the relationship between the federal government and the states has been a topic of debate, with Anti-Federalists expressing concern about state officials swearing to uphold the federal Constitution while federal officials were not required to respect state constitutions. This dynamic has shaped the development of the oath and the role of the state within it. The oath serves as a reminder that while states have their own constitutions and laws, they are ultimately part of a larger federal republic with a shared commitment to constitutional principles.
The state's role in the oath also carries practical implications for the administration of federal offices. As James Madison of Virginia argued, the administration of elections to federal offices, such as the President and Senate, relies on state legislatures. This underscores the interdependence between the federal government and the states, and the role of the oath is to help facilitate cooperation and ensure the smooth functioning of the federal system.
Additionally, the state's role in the oath has evolved over time, particularly during the Civil War. At that time, the oath was revised to address concerns about loyalty and traitors within the government. These changes, such as the addition of the "Ironclad Test Oath," required civilian and military officials to swear they had never aided or encouraged "persons engaged in armed hostility" against the United States. This example illustrates how the state's role in the oath can adapt to meet the changing needs and challenges of the country, always with a focus on upholding the Constitution.
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The inclusion of 'God' in the oath
The inclusion of God in the oath taken by senators and other officials has been a topic of debate in various countries, including the United States and India. While some people argue for the inclusion of God, citing religious and spiritual reasons, others oppose it to maintain a secular state and respect people's freedom of faith.
In the United States, the inclusion of God in the oath is not mandatory. The U.S. Constitution, in Article VI, Clause 3, states:
> "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."
This means that while senators and other officials are required to take an oath to defend the Constitution, the specific wording of the oath is flexible, and individuals can choose to swear or affirm without invoking God. The current oath taken by senators includes the phrase "so help me God," but this is not a requirement and individuals can choose to omit it.
Historically, when the United States were colonies of Great Britain, officials swore allegiance to the king and often included a profession of belief in God. However, the U.S. Constitution specifically states that no religious test shall be required for any office, allowing individuals to affirm their support for the Constitution without invoking God.
In contrast, in India, there has been debate about including the name of God in the oath taken by the President. One member argued for the inclusion of God, citing the Indian religious and spiritual legacy, where all major religions invoke God in their ceremonies and texts. This proposal was opposed by another member, who stated that including God in the oath would exclude those without a belief in God and create an obligation for people to have faith. A similar amendment was proposed, allowing individuals to choose between invoking God or simply affirming, thus respecting a person's freedom of faith.
The inclusion of God in the oath for senators and other officials ultimately depends on the specific country's laws, cultural context, and the values it upholds. While some countries may include religious references in their oaths, others may choose to maintain a secular approach to respect the diverse beliefs of their citizens.
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The oath and the President
The Constitution mandates that the President takes an oath of office. The presidential oath requires more than a general oath of allegiance and fidelity. The President swears to "faithfully execute the office of President of the United States" and to "preserve, protect and defend the Constitution of the United States".
The oath is administered by the Chief Justice of the U.S. Supreme Court, but not always. For example, Lyndon B. Johnson was sworn in by Federal Judge Sarah T. Hughes, Calvin Coolidge by his father, a notary public, and John Quincy Adams used a book of law instead of the Bible.
The oath has changed several times since the First Congress adopted a simple oath in 1789. In 1861, President Abraham Lincoln ordered all federal civilian employees within the executive branch to take an expanded oath, due to the outbreak of the Civil War. In 1862, Congress added a new section, which became known as the "Ironclad Test Oath". This required civilian and military officials to swear they had never aided or encouraged "persons engaged in armed hostility" against the United States.
In 1929, Chief Justice Taft made an error when swearing in President Herbert Hoover, saying "the office of the President of the United States" instead of "the office of President of the United States". In 1945, President Harry S. Truman's bare initial caused an unusual slip when he first took the oath. In 1973, President Richard Nixon added the word "and" between "preserve" and "protect". In 2009, Chief Justice John Roberts incorrectly recited part of the oath when swearing in President Barack Obama, prompting Obama to repeat the mistake.
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Frequently asked questions
Yes, senators are required to take an oath to defend the US Constitution. The current oath is: "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."
The original oath for members of Congress was: "I do solemnly swear (or affirm) that I will support the Constitution of the United States." This was first adopted in 1789. During the Civil War, the oath was revised to address concerns about disloyalty and traitors. The "Ironclad Test Oath" was introduced in 1862 and required civilian and military officials to swear they had never aided enemies of the US.
No, senators are not required to take the "Ironclad Test Oath". While some senators took it voluntarily, Congress did not extend it to its own members.
























