Treason and sedition are the most serious charges the federal government can bring against a person for acting against the United States itself. Treason is defined in the Constitution and limited to levying war against the country or giving aid and comfort to its enemies. Sedition-related offenses — seditious conspiracy, rebellion or insurrection, advocating violent overthrow, and misprision of treason — fill the space around that narrow definition, covering organized plots and incitement to use force against federal authority. Penalties run from seven years in prison for concealing treason up to death for treason itself.
How the Constitution Defines Treason
Article III, Section 3 states that treason “shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort.”1Congress.gov. Article III Section 3 – Treason The word “only” matters. The Framers had seen English monarchs use treason charges to destroy political opponents, and they locked the definition into the Constitution so Congress could not expand it to cover dissent or criticism.
The first path, levying war, means more than a riot or a confrontation with police. Courts read it to require an organized assembly of people actually mobilized to overthrow or forcibly resist government authority. A conspiracy that never leaves the planning stage does not qualify.
The second path, giving aid and comfort to an enemy, requires the United States to be in open hostility with a foreign power or force, and the accused must take concrete action helping that enemy. Passing classified intelligence, funneling money to enemy forces, or harboring enemy agents all qualify. Sympathy for an adversary does not. In Haupt v. United States, the Supreme Court held that the overt act must move treason “from the realm of thought into the realm of action,” and that two witnesses must testify to each act the government relies on.2Legal Information Institute. Haupt v United States
Who Can Be Charged With Treason
The federal treason statute, 18 U.S.C. § 2381, reaches anyone “owing allegiance to the United States.”3Office of the Law Revision Counsel. 18 USC 2381 – Treason Every U.S. citizen owes that allegiance regardless of where they live. In Kawakita v. United States, the Supreme Court upheld the treason conviction of a dual U.S.-Japanese citizen who abused American prisoners of war in Japan during World War II, rejecting his argument that living in Japan freed him from his obligation. An American citizen, the Court wrote, “cannot turn it into a fair-weather citizenship, retaining it for possible contingent benefits but meanwhile playing the part of the traitor.”4Justia U.S. Supreme Court. Kawakita v United States, 343 US 717 (1952)
Resident aliens and others physically present under the protection of U.S. law also owe a form of allegiance and can be charged, though most historical prosecutions have involved citizens. A foreign national who has never set foot in the country and owes no allegiance is not subject to the statute, though other federal crimes like espionage can still apply.
The Two-Witness Rule
The Constitution sets a uniquely high evidentiary bar for treason. No one can be convicted “unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court.”1Congress.gov. Article III Section 3 – Treason Two people must independently testify to the same specific act. A confession extracted in private will not do; it must happen in open court.
The Supreme Court explored what this means in Cramer v. United States. The government charged Cramer with treason after he met with German saboteurs during World War II. Two FBI agents saw the meetings, but what they saw looked ordinary — people sitting together in a restaurant. The Court reversed the conviction, holding that the overt act proved by two witnesses must, on its own, show that the defendant actually gave aid and comfort to the enemy. Prosecutors cannot use two-witness testimony to prove a harmless-looking act and then layer on circumstantial evidence to make it look treasonous.5Justia U.S. Supreme Court. Cramer v United States, 325 US 1 (1945)
The practical effect is that treason is brutally hard to prove. If one witness saw a weapons delivery on Monday and a second witness saw a different delivery on Thursday, the requirement is not met. Both must testify to the same event. Only one person has been indicted for treason since 1954, and that case never went to trial.
Penalties for Treason
Under 18 U.S.C. § 2381, a person convicted of treason faces death or imprisonment of at least five years, with a minimum fine of $10,000.3Office of the Law Revision Counsel. 18 USC 2381 – Treason The statute sets a floor but no ceiling short of death, so a judge can impose anywhere from five years to life. The maximum fine for an individual, as with other federal felonies that do not specify a cap, is $250,000 under the general sentencing statute.6Office of the Law Revision Counsel. 18 US Code 3571 – Sentence of Fine
A treason conviction also permanently bars the person from holding any federal office. Combined with the possibility of execution, these penalties make treason the single most severely punished crime in the federal system.
Misprision of Treason
Knowing about treason and staying silent is itself a federal crime. Under 18 U.S.C. § 2382, anyone who owes allegiance to the United States, learns that treason has been committed, and conceals that knowledge instead of reporting it is guilty of misprision of treason.7Office of the Law Revision Counsel. 18 USC 2382 – Misprision of Treason The statute requires disclosure “as soon as may be” to the President, a federal judge, a state governor, or a state judge.
The crime has two elements: actual knowledge that treason has occurred, and active concealment rather than disclosure. Failing to report a vague rumor would not satisfy either. The penalty is up to seven years in federal prison, a fine of up to $250,000, or both.
Rebellion or Insurrection
Federal law draws a line between treason, which requires an external enemy or a full levying of war, and rebellion or insurrection, which covers domestic uprisings against government authority. Under 18 U.S.C. § 2383, anyone who incites, assists, or takes part in a rebellion or insurrection against the United States, or provides aid or comfort to one, faces up to ten years in prison.8Office of the Law Revision Counsel. 18 USC 2383 – Rebellion or Insurrection A conviction also permanently bars the person from federal office.
Neither term has a precise statutory definition, but courts generally read insurrection as a violent uprising intended to overthrow, disrupt, or challenge federal authority, and rebellion as a more widespread, organized armed resistance. The prosecution must show the defendant acted knowingly and intentionally. Being accidentally present at a violent event does not meet the standard.
Seditious Conspiracy
Seditious conspiracy under 18 U.S.C. § 2384 targets the planning stage. The crime occurs when two or more people agree to overthrow the government by force, to wage war against the United States, to forcibly oppose federal authority, to forcibly block or delay any federal law, or to seize federal property against the law.9Office of the Law Revision Counsel. 18 USC 2384 – Seditious Conspiracy The maximum penalty is 20 years in federal prison, a fine of up to $250,000, or both.6Office of the Law Revision Counsel. 18 US Code 3571 – Sentence of Fine
The word “conspiracy” is doing the heavy lifting. Unlike treason, seditious conspiracy does not require an external enemy or a completed act of violence. Prosecutors need to prove that the defendants reached a genuine agreement to use force against federal authority and that the agreement went beyond talk. That lets the government intervene before an attack occurs.
What separates seditious conspiracy from a common riot is the target and the intent. A riot is typically chaotic and spontaneous. Seditious conspiracy requires a deliberate plan aimed at undermining the federal government’s ability to function. Peaceful protest, aggressive political rhetoric, and even inflammatory speech are protected by the First Amendment. The line is crossed when people move from words to a concrete agreement to use force against the government.
These charges were historically rare. Prosecutors brought them against Puerto Rican nationalists in the 1950s and against members of a militant Islamic group in the 1990s. The charge drew wider public attention after the January 6, 2021 Capitol breach, when federal prosecutors secured seditious conspiracy convictions against leaders of the Oath Keepers and Proud Boys. Those convictions have faced subsequent legal developments.
Advocating Government Overthrow
The Smith Act, codified at 18 U.S.C. § 2385, makes it a crime to knowingly advocate overthrowing any U.S. government — federal, state, or local — by force or violence, or to organize or join a group dedicated to that purpose.10Office of the Law Revision Counsel. 18 USC 2385 – Advocating Overthrow of Government The law also prohibits publishing or distributing material advocating violent overthrow when done with the intent to cause it. Penalties mirror seditious conspiracy: up to 20 years in prison, a fine, or both, plus a five-year ban on federal employment after conviction.
On paper, the Smith Act is broad. In practice, the Supreme Court has narrowed it sharply. In Brandenburg v. Ohio, the Court held that the government cannot punish advocacy of illegal action “except where such advocacy is directed to inciting or producing imminent lawless action and is likely to incite or produce such action.”11Justia U.S. Supreme Court. Brandenburg v Ohio, 395 US 444 (1969) You can stand on a street corner and argue that the government should be overthrown. You can write a book making that case. What you cannot do is stand in front of an armed crowd and urge them to march on a government building right now, under circumstances where violence is actually likely to follow. That distinction between abstract advocacy and incitement to imminent action is the constitutional line that keeps the Smith Act from swallowing the First Amendment.
How the Five Offenses Compare
The federal offenses in this area form a rough hierarchy based on severity and the conduct required to trigger them:
- Treason (§ 2381): levying war or aiding an enemy of the United States, with two witnesses required to the same overt act. Punishable by death or at least five years in prison, a minimum $10,000 fine, and permanent disqualification from federal office.
- Seditious conspiracy (§ 2384): agreeing with others to overthrow the government or oppose federal authority by force. No external enemy required. Up to 20 years in prison and a fine of up to $250,000.
- Rebellion or insurrection (§ 2383): participating in or aiding an armed uprising against federal authority. Up to 10 years in prison and permanent disqualification from federal office.
- Advocating overthrow (§ 2385): knowingly teaching or organizing around the violent overthrow of the government, but only when the advocacy crosses into incitement of imminent action. Up to 20 years in prison, plus a five-year ban on federal employment.
- Misprision of treason (§ 2382): knowing about treason and concealing it instead of reporting it. Up to seven years in prison and a fine of up to $250,000.
All five share a common thread. The government must prove the defendant did something well beyond expressing an unpopular opinion. Words alone, no matter how inflammatory, do not satisfy any of these statutes, and courts have consistently enforced that line.