
The conviction of treason is a serious matter in the United States, with specific requirements that must be met to prove the charge. The Constitution defines treason as levying war against the United States or aiding their enemies. To convict someone of treason, the government must prove two elements: adherence or loyalty to an enemy of the United States, and providing aid or comfort to that enemy. The standard of proof for a treason conviction is high, requiring testimony from two witnesses to the same overt act or a confession in open court. This two-witness principle ensures that treasonous intent is evident and protects against circumstantial evidence or the testimony of a single witness. The punishment for treason is decided by Congress and can include imprisonment, fines, and ineligibility for employment by the United States.
| Characteristics | Values |
|---|---|
| Number of witnesses required | 2 |
| Witness testimony | Must describe the same obvious act of treason |
| Confession | Must be made in open court |
| Accused's intent | Must be evident from witnessed acts |
| Adherence to the enemy | Must be proven |
| Rendering aid and comfort to the enemy | Must be proven |
| Punishment | Death, imprisonment of at least 5 years, fine of at least $10,000, and disqualification from holding office |
| Punishment decided by | Congress |
| Punishment limitations | No attainder of treason shall work corruption of blood, or forfeiture beyond the life of the person attainted |
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What You'll Learn
- The act of treason must be witnessed by two people or confessed in open court
- The act must be treasonable in itself, i.e. an open action against the US
- The act must aid the enemy in an essential way, not just be casually useful
- The defendant's intent must be evident from their acts, not just their internal state of mind
- The act must involve adherence to the enemy, i.e. intent to betray the US

The act of treason must be witnessed by two people or confessed in open court
The US Constitution sets out specific requirements for convicting someone of treason. The crime of treason is defined as levying war against the United States or aiding their enemies. The act of treason must be witnessed by two people or confessed in open court by the accused. This is known as the "two-witness principle" or "two-witness requirement".
The "two-witness principle" states that every act, movement, deed, and word of the defendant charged with treason must be supported by the testimony of two witnesses. This raises the bar for prosecution and protects against circumstantial evidence or the testimony of a single witness. The Cramer Court clarified that a defendant's disloyal intent must be evident from the witnessed acts, and the government must prove that each act gave aid and comfort to the enemy.
The requirement for two witnesses or a confession in open court is geared towards making treason convictions difficult to obtain. It serves as a safeguard against a corrupt executive or Congress attempting to expand the definition of treason or lower the standard of proof. This provision in the Constitution ensures that treason convictions are based on clear and compelling evidence, rather than circumstantial evidence or the testimony of a single witness.
The "two-witness principle" also aligns with the belief that no witness can truly testify to a defendant's internal state of mind. Therefore, the acts of treason themselves must be incriminating and clearly demonstrate the defendant's disloyal intent. This principle underscores the gravity of the offense and ensures that treason convictions are based on concrete actions and intentions, rather than speculative inferences.
In conclusion, the requirement for two witnesses or a confession in open court is a critical aspect of treason convictions under the US Constitution. It safeguards against unjust convictions, raises the standard of proof, and ensures that treasonous intent is evident from the acts themselves. This provision protects the rights of the accused and underscores the seriousness of the offense of treason.
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The act must be treasonable in itself, i.e. an open action against the US
The US Constitution defines treason as levying war against the United States or adhering to their enemies, giving them aid and comfort. This act of "levying war" refers to an assembly of people for a purpose that is "treasonable in itself". It requires an open action against the United States through the use of force.
To convict someone of treason for giving aid or comfort to an enemy, the government must prove two elements: adherence or loyalty to an enemy of the United States, and providing aid or comfort to that enemy. A US citizen may hold beliefs that are disloyal to the United States, but as long as they do not act on these beliefs by giving aid or comfort to the enemy, they have not committed treason.
The Supreme Court has interpreted "levying war" narrowly, requiring an actual assemblage of men for the purpose of executing a treasonable design. In the case of Ex parte Bollman (1807), the Court dismissed charges of treason against two associates of former Vice President Aaron Burr, who was accused of plotting to overthrow the American government in New Orleans. The Court held that their conduct, which included recruiting troops, procuring maps, and drawing up plans, did not constitute "levying war" as it was not an actual waging of war.
The Treason Clause of the Constitution requires that treason be proven by the testimony of two witnesses to the same overt act or by a confession in open court. This clause sets important requirements for how treason charges must be proven and protects against a corrupt executive or Congress from easily expanding the definition of treason or changing the proof needed for conviction.
In summary, for an act to be treasonable in itself, it must be an open action against the US, involving the use of force and constituting an actual waging of war. The government must prove that the accused had a disloyal intent, which must be evident from witnessed acts, and that their actions gave aid and comfort to the enemy.
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The act must aid the enemy in an essential way, not just be casually useful
The US Constitution defines treason as "levying war" against the United States or "adhering to their enemies, giving them aid and comfort". To convict someone of treason for giving aid and comfort to an enemy, the government must prove two elements: adherence or loyalty to an enemy of the United States, and providing aid or comfort to the enemy.
The act of giving aid or comfort to an enemy must be more than just "casually useful" to them. It must assist the enemy in a way that is essential to their plan or design to commit a treasonous act. This means that the aid or comfort provided must actively support or enable the enemy's treasonous intentions. It is not enough to simply hold beliefs that are disloyal to the United States or to criticize the government. There must be a direct and intentional act of providing aid or comfort that betrays the allegiance owed to the United States.
The Supreme Court has interpreted the meaning of "levying war" narrowly, holding that it requires an "actual assemblage of men for the purpose of executing a treasonable design". In other words, there must be an open action against the United States through the use of force, and not just a conspiracy or plan to commit such acts. This interpretation was established in the case of Ex parte Bollman in 1807, where the Court dismissed treason charges against two associates of former Vice President Aaron Burr, who had allegedly conspired to overthrow the American government in New Orleans. The Court found that their conduct did not constitute "levying war" as it did not involve the actual waging of war.
The requirement for two witnesses or a confession in open court further emphasizes the seriousness of treason charges. This standard of proof, established by the Treason Clause, protects against the expansion of treason's definition by a potentially corrupt executive or Congress. It ensures that treasonous acts are clearly established and provides a safeguard against false accusations or misinterpretation of intent. The Cramer case in 1945 is an example of how the two-witness requirement raises the bar for prosecution, as the Court reversed the conviction due to insufficient evidence of aid and comfort being provided to an enemy soldier.
In summary, for an act to aid the enemy in an essential way, it must directly contribute to their treasonous plan or design. It cannot be casually useful but must actively support their intentions. This interpretation ensures that treasonous acts are clearly distinguished from acts of criticism or disloyalty, protecting individuals' rights while maintaining national security.
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The defendant's intent must be evident from their acts, not just their internal state of mind
The Treason Clause of the US Constitution requires that treason against the United States consists of levying war against the nation or aiding its enemies. The act of treason must be supported by the testimony of two witnesses to the same overt act or a confession in open court. The Cramer Court clarified that a defendant's disloyal intent must be evident from their acts, not just their internal state of mind. This is because it is believed that no witness can truly testify to a defendant's internal state of mind. The Court held that conversation and occurrences prior to the indictment were admissible evidence of the defendant's intent.
The Constitution requires that treasonous acts must be “open actions" against the United States, and not just a conspiracy. This means that a person can be convicted of treason for levying war only if there is an “actual assemblage of men for the purpose of executing a treasonable design". The act of giving aid or comfort to an enemy must also assist them in an essential way in their plan or design to commit a treasonous act. For example, a citizen can give a speech criticizing the government, but as long as there is no intent to betray the nation, it is not treason.
The Treason Clause sets a high standard for treason convictions, requiring two witnesses to the same act or a confession in open court. This protects against a corrupt executive or Congress from easily expanding the definition of treason or changing the proof needed for conviction. The requirement of two witnesses to the same act is geared towards raising the bar for prosecution. This principle holds even if one of the witnesses is the accused themselves. The Framers of the Constitution believed there was a crucial distinction between traitorous actions and treasonous thoughts, requiring some sort of action before a conviction for treason.
The Supreme Court has interpreted the Treason Clause throughout history, with landmark cases including United States v. Burr and Ex parte Bollman & Swarthout, which involved treason charges against two associates of former Vice President Aaron Burr. These cases have helped shape the modern understanding of treason and set important precedents for future cases. The Treason Clause serves as a reminder about national security and the gravity of treason as an offense, ensuring that its parameters are clear and distinct from earlier definitions under British law.
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The act must involve adherence to the enemy, i.e. intent to betray the US
The US Constitution defines treason as "levying war" against the United States or "adhering to their enemies, giving them aid and comfort". This means that to convict someone of treason, it must be proven that they intended to betray the US by providing aid to an enemy.
The act of treason requires overt actions against the United States, not just a conspiracy or plan. The accused must have actively aided the enemy in a way that was essential to their treasonous plan or design. For example, a US citizen may hold beliefs that are disloyal to the United States, but as long as they do not act on these beliefs by providing aid or comfort to an enemy, they have not committed treason.
The Treason Clause sets forth important requirements for proving treason, including the need for testimony from two witnesses to the same overt act or a confession in open court. This "two-witness principle" ensures that the defendant's disloyal intent is evident and prevents the use of circumstantial evidence or the testimony of a single witness. The requirement of two witnesses raises the bar for prosecution and protects against false accusations or misinterpretation of intent.
In the case of Cramer (1945), the Supreme Court explored the history of the Treason Clause in depth. The Court held that the defendant's intent to aid and comfort the enemy must be clear and could be supported by conversation and occurrences prior to the indictment. While treason charges are rare, the possibility remains that they could increase in relative frequency, emphasizing the ongoing importance of the Treason Clause in ensuring that acts of treason are proven beyond doubt.
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Frequently asked questions
Treason against the United States is defined by the Constitution as levying war against the country or adhering to the country's enemies, giving them aid and comfort.
No person can be convicted of treason unless there is testimony from two witnesses to the same overt act or a confession in open court.
"Aid and comfort" must assist the enemy in some essential way to assist in their plan or design to commit a treasonous act. For example, a citizen can give a speech criticizing the government, but as long as there is no intent to betray, there is no treason.

























