
Treason is the only crime defined in the US Constitution. Article III, Section 3 of the US Constitution states that treason against the United States shall consist only of levying war against the country or adhering to its enemies, giving them aid and comfort. The Framers of the US Constitution intended to define treason narrowly, restricting Congress's power to change the definition and the proof needed to establish charges of treason. The Constitution also specifies that no person shall be convicted of treason unless there is testimony from two witnesses to the same overt act or a confession in open court.
| Characteristics | Values |
|---|---|
| Where is treason defined in the U.S. Constitution? | Article III, Section 3, Clause 1 |
| What is treason defined as? | levying war against the United States or adhering to their enemies, giving them aid and comfort |
| Who can commit treason? | U.S. citizens, dual citizens, aliens domiciled in the U.S., and citizens of states |
| What is required to prove treason? | testimony of two witnesses to the same overt act or confession in open court |
| What is the punishment for treason? | death, minimum 5 years' imprisonment and a $10,000 fine, forfeiture of the right to hold public office |
| Can Congress change the definition of treason? | No, but they can specify other subversive crimes and their punishments |
| What is the history of treason laws in the U.S.? | Based on English legal tradition, specifically the Treason Act of 1350/1351, but omitting references to the king's death; the First Amendment also limits treason prosecutions by protecting free speech |
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What You'll Learn

Treason is the only crime defined in the US Constitution
Treason is the only crime that is explicitly defined in the US Constitution. Article III, Section 3, Clause 1 of the US Constitution states:
> "Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort. No Person shall be convicted of Treason unless on the testimony of two Witnesses to the same overt Act, or on Confession in open Court."
This definition restricts Congress's ability to change the definition of treason or the proof required to establish charges. The Framers of the Constitution intended to create a narrow definition of treason, making it challenging to prove. This was due to their experience with English law, where the definition of treason was broad and often used to eliminate political dissidents. The Framers adapted parts of the English Statute of Treason but omitted the phrase defining treason as "compassing or imagining the death of the King", which had been used to develop constructive treason laws.
The US Constitution's definition of treason includes two main acts: levying war against the United States and providing aid and comfort to its enemies. "Levying war" refers to assembling and using force to oppose the execution of a public law. It does not include merely conspiring to overthrow the government. Providing "aid and comfort" to the enemy means taking action to assist them, and it cannot be committed during peacetime. Sympathy for the enemy is not enough to constitute treason.
To secure a conviction for treason, the federal government must meet strict standards of proof. Either two witnesses must testify to the same overt act of treason, or the accused must confess in open court. An overt act refers to an action that demonstrates criminal intent and furthers the accomplishment of a crime. While words alone may not constitute treason, they can serve as proof of treasonous intent.
The Constitution authorizes Congress to set the penalties for treason but not to alter the definition or create degrees of treason. The federal treason statute, 18 U.S.C. § 2381, imposes minimum penalties of five years' imprisonment and a $10,000 fine. A conviction also carries the possibility of the death penalty and bars the defendant from holding federal office.
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The Framers wanted a restrictive concept of treason
The Framers of the U.S. Constitution intended to define treason narrowly, adopting a restrictive concept of the crime. They had witnessed how the English kings and British Parliament had escalated ordinary partisan disputes into capital charges of treason, using the crime of treason to eliminate their political dissidents. The Framers wanted to prevent the politically powerful from doing the same.
The Framers adapted parts of the English Statute of Treason, enacted in 1350, when formulating the treason clause. However, they specifically omitted the phrase defining treason as "the 'compassing or imagining the death of our lord the King'". This was the principal instrument by which treason charges were used to suppress political opposition in England.
By defining treason in the Constitution, the Framers restricted Congress's power to change the definition of the crime and the proof needed to establish charges of treason. The treason clause, found in Article III, Section 3, Clause 1, states:
> Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort. No Person shall be convicted of Treason unless on the testimony of two Witnesses to the same overt Act, or on Confession in open Court.
This restrictive definition of treason in the U.S. Constitution ensures that nonviolent political processes are protected from prosecution and that the crime of treason is narrowly defined.
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Requirements for conviction: testimony of two witnesses or confession in open court
The U.S. Constitution outlines specific requirements for convicting an individual of treason, emphasising the need for either testimony from multiple witnesses or a confession made in an open court. This provision, outlined in Article III, Section 3, Clause 1 of the Constitution, underscores the gravity of treason charges and the importance of robust evidentiary standards for securing a conviction.
To establish treason, which is defined as levying war against the United States or providing aid and comfort to its enemies, the prosecution must satisfy stringent criteria. The requirement of testimony from two witnesses to the same overt act of treason serves as a critical safeguard. This provision ensures that circumstantial evidence or the testimony of a single witness is insufficient for a conviction. An overt act, in this context, refers to an action that demonstrates criminal intent and advances the commission of treason.
The alternative path to conviction involves a confession made voluntarily by the accused, either outside or inside a court setting. The voluntariness of a confession is a pivotal aspect, as it must be free from any form of duress, coercion, or intimidation. The prosecution bears the burden of proving voluntariness, and the trial judge plays a crucial role in assessing the circumstances surrounding the confession. Factors considered by the judge include the time between arrest and arraignment, the accused's awareness of the charges, and whether the accused was advised of their rights and the potential consequences of their statements.
It is worth noting that while confessions made voluntarily can be admissible in court, the weight given to them is ultimately determined by the jury, who consider all the relevant circumstances. The admissibility of confessions is further nuanced, with some sources indicating that confessions made while under arrest or in law enforcement custody may face admissibility challenges.
In conclusion, the requirements for conviction of treason in the United States Constitution underscore the seriousness of the charge and the need for robust evidentiary standards. The Constitution's framers, cognizant of the potential for abuse under broad treason laws, instituted safeguards to protect individuals from unjust convictions. By requiring the testimony of two witnesses to the same overt act or a voluntary confession, the Constitution sets a high bar for securing treason convictions.
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Treason against states
Treason is a rare but very serious crime. In the United States, treason is the only crime defined in the US Constitution. According to Article III, Section 3, treason against the United States consists only of levying war against the US or adhering to their enemies, giving them aid and comfort. The Constitution also specifies that no person shall be convicted of treason unless there is testimony from two witnesses to the same overt act or a confession in open court.
The Framers of the US Constitution intended to define treason narrowly, adapting parts of the English Statute of Treason but leaving out the phrase defining treason as "the 'compassing or imagining the death of our lord the King'". They wanted to make it challenging to establish that someone had committed treason and to restrict Congress's power to change the definition of the crime.
The federal treason statute, 18 U.S.C. § 2381, imposes minimum penalties of five years' imprisonment and a $10,000 fine. A conviction bars the defendant from holding federal office and carries the possibility of the death penalty. State treason prosecutions are extremely rare, as most treason threatens the nation rather than a single state.
Treason must be intentional, and someone who unintentionally aids the enemy or is forced to by duress or coercion is not guilty of treason. The First Amendment is the primary limitation on treason prosecutions, as it protects freedom of speech. However, words can serve as proof of the speaker's treasonous intent.
There are two ways to commit treason: levying war against the government or providing aid or comfort to the enemy. Levying war includes any forcible opposition to the execution of a public law, which ordinarily requires the actual use of force by multiple people with the common purpose of preventing a law from being enforced. Weapons are not always required; sheer numbers can be enough. Providing aid or comfort to the enemy means more than giving assistance that is "casually useful" to them; the actor must take some kind of action to provide aid or comfort. Treason by aiding the enemy cannot be committed during peacetime; there must be an actual enemy.
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Treason does not apply to foreign nationals
Treason is the only crime that is explicitly defined in the US Constitution. Article III, Section 3 of the Constitution defines treason against the United States as "only in levying war against them, or in adhering to their enemies, giving them aid and comfort". However, this charge only applies to US citizens or those who owe a temporary allegiance to the country, such as immigrants residing in the United States.
Foreign nationals who do not owe any allegiance to the United States cannot be charged with treason. This is because treason requires the defendant to owe allegiance to the US government, which foreign nationals do not. Instead, they may be charged with other crimes such as espionage, which involves obtaining classified information for a foreign nation.
It is important to note that treason is a rare but serious crime. The First Amendment limits treason prosecutions by protecting freedom of speech, even if it expresses anger towards the government. However, it does not protect speech that incites violence. While words alone are usually not enough to constitute treason, they can indicate a treasonous intent.
To be charged with treason, one must either levy war against the US government or provide aid or comfort to its enemies. "Enemies" has been interpreted narrowly to refer specifically to enemies in a real war, and treason can only be committed during wartime. This narrow definition was included in the Constitution to prevent the misuse of treason charges by "violent factions".
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Frequently asked questions
Treason is the only crime that is defined in the US Constitution. It is the act of betraying the allegiance one owes to one's home nation.
The US Constitution identifies two types of conduct that constitute treason: (1) "levying war" against the United States, and (2) "adhering to [the] enemies [of the United States], giving them aid and comfort."
The federal treason statute, 18 U.S.C. § 2381, imposes minimum penalties of five years' imprisonment and a $10,000 fine. A conviction also bars the defendant from holding any federal office and carries the possibility of the death penalty.
























