Anaya Nolan
In 2025, there were rumors that President Donald Trump would declare martial law in the United States. This was speculated to occur on April 20, 2025, after Trump invoked the Insurrection Act of 1807, a federal law that empowers the president to deploy the military to suppress insurrections or domestic violence. While the Constitution does not explicitly grant the president the power to declare martial law, several presidents throughout history have done so. This action would have granted Trump the ability to deploy the military to the southern border and order troops to assist law enforcement in carrying out domestic policies. However, as of April 21, 2025, there was no indication that Trump had declared martial law.
| Characteristics | Values |
|---|---|
| Can President Donald Trump declare martial law? | It is unclear whether the president can legally declare martial law. However, several presidents throughout history have done so. |
| What is martial law? | Martial law refers to instances when a nation's armed forces step in and assume the governance of an area. |
| What is the Insurrection Act of 1807? | A federal law that empowers the president to deploy the US military and National Guard to suppress insurrections or domestic violence. |
| Has Trump invoked the Insurrection Act of 1807? | No, but there were online rumors in April 2025 that he would invoke the act and declare martial law. |
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What You'll Learn
- The US Constitution does not specify who can declare martial law
- Several presidents have declared martial law throughout history
- The Insurrection Act of 1807 allows the president to deploy the military
- Martial law involves the suspension of civil rights and liberties
- The Supreme Court has never held that the president can declare martial law
The US Constitution does not specify who can declare martial law
Martial law refers to instances when a nation's armed forces assume the governance of an area. It is typically declared when civilian authority over an area has stopped functioning, such as during an insurrection or natural disaster. When martial law is declared, local laws, civil authority, and sometimes local judiciaries are suspended and replaced by temporary laws and military tribunals. This gives the military commander virtually unlimited authority to govern an area.
Throughout history, martial law has been imposed at least 68 times in the United States, mostly by federal and state officials, and not by a president since the Civil War. Examples include the Battle of New Orleans, the Great Chicago Fire of 1871, the 1906 San Francisco earthquake, the Akron Riot of 1900, and the Omaha race riot of 1919.
There are two competing theories regarding the source of the power to declare martial law. The first theory states that martial law does not come from any direct authority but rather from the government's right, power, and/or duty to "maintain public order" and keep the peace. The second theory argues that the Constitution's enumerated war powers of the legislative and executive branches give both Congress and the president the power to declare martial law.
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Several presidents have declared martial law throughout history
While there is no indication that martial law is being considered in the US, there have been several instances of presidents declaring martial law throughout history.
The US Constitution does not define martial law and does not specify who can declare it. However, according to a modern interpretation, the president and state officials can declare "degrees of martial law in specific circumstances."
Some scholars argue that the president has the executive power to declare martial law, while others believe that congressional authorization is required for the president to impose it in a civilian area.
- In 1814, Gen. Andrew Jackson declared martial law in New Orleans during the Battle of New Orleans.
- In 1845, martial law was declared in Nauvoo, Illinois, by Joseph Smith, who led an organized city militia of about 5,000 men to protect Nauvoo from outside violence. Smith was later arrested for treason against the state of Illinois for declaring martial law.
- In 1857, Governor Brigham Young declared martial law in the Utah Territory to facilitate armed resistance against approaching federal troops.
- In 1861, President Lincoln imposed Congressionally authorized martial law on Kentucky, Maryland, and Missouri.
- In 1866, Gen. Absalom Baird initially declared martial law in Seattle, Washington Territory, which was later ratified and extended by President Andrew Johnson.
- In 1886, President Grover Cleveland issued a proclamation to disperse under the Insurrection Act, leading some to incorrectly conclude that he declared martial law.
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The Insurrection Act of 1807 allows the president to deploy the military
In 2025, there were rumours that President Donald Trump would invoke the Insurrection Act of 1807 and declare martial law. The Insurrection Act of 1807 is a law that allows the president to deploy the federal military or federalize the National Guard to act as civilian law enforcement. It is a replacement of the earlier Calling Forth Act of 1792, which allowed for the federalization of state militias.
The Insurrection Act does not, however, authorize martial law. Martial law is generally understood as the power that allows the military to take over the role of civilian government in an emergency. The Insurrection Act, in contrast, permits the military to assist civilian authorities, not replace them. Under current law, the president has no authority to declare martial law. The Constitution does not grant the president the power to declare martial law, and it does not specify who can declare it. While some scholars believe the president has the executive power to declare martial law, others argue that congressional authorization is required.
In the past, the Insurrection Act has been invoked in response to 30 crises, and it has been modified twice. The first modification was in 1861, which allowed the federal government to use the National Guard and armed forces against the will of the state government in the case of rebellion against the authority of the United States government. The second modification was in 1871, which revised the Act to protect Black Americans from attacks by the Ku Klux Klan.
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Martial law involves the suspension of civil rights and liberties
The imposition of martial law involves the temporary transfer of authority from civilian institutions to the military. It is usually invoked in times of war, rebellion, or natural disaster when civilian authority has ceased to function or is ineffective. Martial law can be declared by the president or a state governor, but a formal proclamation is not necessary.
When martial law is in effect, the military commander of an area or country assumes virtually unlimited authority to make and enforce laws, including the power to dissolve the parliament and suspend the constitution, civil rights, civil authority, and the ordinary administration of justice. Martial law may also be accompanied by curfews and the application of military law or military justice to civilians.
In the United States, the Constitution does not explicitly grant the president the power to declare martial law, and it has been declared by federal and state officials over 60 times, but not by a president since the Civil War. While the Supreme Court has held that states can declare martial law, it has never specifically held that the president can. Thus, it is unclear whether the president can legally declare martial law, and it may be that only Congress has the authority to do so.
During the American Civil War, President Lincoln imposed Congressionally authorized martial law on Kentucky, Maryland, and Missouri, suspending habeas corpus and civil rights. The Supreme Court later ruled that Lincoln's imposition of martial law by suspending habeas corpus was unconstitutional in areas where local courts were still in session.
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The Supreme Court has never held that the president can declare martial law
The US Constitution does not define martial law, nor does it specify who can declare it. While the Supreme Court has held that states can declare martial law, it has never explicitly ruled that the president can. Therefore, it is unclear whether the president can legally declare martial law.
Some scholars argue that the president has the executive power to declare martial law. Others believe that the president requires congressional authorization to impose martial law in a civilian area. This suggests that Congress may be the only governmental branch that can legally declare martial law, and the president can only act according to its actions.
There are two competing theories regarding the source of the power to declare martial law. The first theory suggests that martial law arises from the government's right, power, and/or duty to "maintain public order" and keep the peace. The second theory posits that the Constitution's enumerated war powers of the legislative and executive branches give both Congress and the president the power to declare martial law.
Despite the uncertainty, several presidents throughout history have declared martial law. Additionally, there have been discussions and rumours about President Donald Trump potentially invoking the Insurrection Act of 1807 and declaring martial law. However, it is important to note that the Insurrection Act generally permits the military to assist civilian authorities, not take their place.
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Frequently asked questions
There is no clear answer to this question. The Constitution does not define martial law and does not specify who can declare it. While several presidents have declared martial law throughout history, the Supreme Court has never explicitly held that the president can. Some scholars argue that the president has the executive power to declare martial law, while others believe that congressional authorization is required.
Martial law refers to instances when a nation's armed forces assume the governance of an area, typically in response to an insurrection or natural disaster. It involves the suspension of local laws, civil authority, and sometimes local judiciaries, with military commanders implementing their own temporary laws and military tribunals.
There is no established definition of martial law, and it is not explicitly mentioned in the Constitution. However, it is generally understood as a power that allows the military to take over the role of civilian government in an emergency. The president may have the authority to declare martial law during wartime or when granted by Congress.
The Insurrection Act of 1807 is a federal law that allows the president to deploy the military within the United States to suppress civil disturbances or insurrections. While the Act itself does not authorize martial law, there were rumors in April 2025 that President Trump might invoke the Act and then declare martial law on April 20, 2025. These rumors were fueled by an executive order declaring a national emergency at the southern border and requiring a report on whether to invoke the Insurrection Act.
