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Donald Trump says he may invoke a centuries-old law to override courts and governors blocking troop deployments to US cities. Here’s what makes the Insurrection Act so powerful
US President Donald Trump (Image: AFP)
US President Donald Trump has once again stirred legal and political debate by threatening to invoke the Insurrection Act, a rarely used law that gives American presidents sweeping emergency powers to deploy troops on domestic soil. The move comes amid mounting legal pushback to Trump’s efforts to send National Guard units into Democratic-run cities like Portland and Chicago, ostensibly to support federal crackdowns on illegal immigration and restore public order.
Critics, however, say Trump is overstepping his constitutional limits and misusing the military to target political opponents.
With federal judges already stepping in and state governors launching legal action, the battle over the Insurrection Act is shaping into a major flashpoint in Trump’s presidency.
In a recent speech to top military officials, Trump said American cities could be used as “training grounds” for armed forces, a statement that alarmed Democrats and civil liberties groups and raised fresh concerns over growing militarisation.
What Is The Insurrection Act?
The Insurrection Act is a US federal law that allows the president to deploy the military within the country to respond to serious unrest, violence, or rebellion. It was originally passed in 1807 and is one of the very few exceptions to the long-standing American principle that the military should not interfere in civilian life or local policing.
In the US, law enforcement is generally handled by civilian police at the state or city level. The military, including the National Guard, is mostly restricted from carrying out police duties under a law called the Posse Comitatus Act of 1878. But the Insurrection Act overrides this restriction in emergencies, allowing the president to use troops to help restore law and order.
Although commonly referred to as the “Insurrection Act of 1807″, the current law actually combines several related laws passed between 1792 and 1871. It was signed into law by then-President Thomas Jefferson and built upon earlier laws that permitted the federal government to call up state militias, now known as the National Guard, in times of crisis.
When Can The President Use It?
The Act outlines several situations where the president can invoke its powers. In the usual case, a state governor or the state legislature would request federal help to control a violent uprising or restore order, and the president would respond by deploying troops.
However, the law also allows the president to act unilaterally, without a state’s consent, if he believes that serious disruptions, described in the law as “unlawful obstructions, combinations, or assemblages, or rebellion”, are preventing the enforcement of federal law or violating constitutional rights.
One part of the Act, known as Section 252, allows troop deployment when regular courts and legal processes can no longer function effectively. Section 253 goes even further; it lets the president send in the military if local authorities are either unable or unwilling to protect people’s rights or to stop an uprising that is blocking the enforcement of federal law.
However, legal experts warn that this is not meant to be used lightly. Bruce Fein, a constitutional lawyer, told Al Jazera that these powers were intended only for situations of extreme national crisis, such as a full-scale rebellion like the American Civil War. “No underanged person believes a rebellion is underway in Portland,” Fein said.
Has The Insurrection Act Been Used Before?
Yes, but very rarely in recent decades. The Act has been invoked in response to 30 incidents throughout US history, according to the Brennan Center for Justice. Its most prominent use came during the 1960s civil rights movement, when Presidents Dwight D. Eisenhower and John F. Kennedy used it to enforce school desegregation in Southern states following the Supreme Court’s Brown v. Board of Education ruling.
The last time it was used was in 1992, when President George H.W. Bush sent federal troops to Los Angeles to quell riots following the acquittal of four police officers in the brutal beating of Rodney King, a Black motorist. The violence, which lasted six days, led to more than 60 deaths and widespread destruction.
Why Is Trump Threatening To Invoke It Now?
Trump has repeatedly claimed that cities like Chicago and Portland are experiencing a breakdown of law and order due to protests against his immigration policies and overall rise in crime. “If you look at Chicago, Chicago is a great city where there’s a lot of crime, and if the governor can’t do the job, we’ll do the job. It’s all very simple,” he told reporters in the Oval Office.
He has said he might invoke the Act if state governors or courts continue to block his deployment of National Guard troops. “We have an Insurrection Act for a reason,” Trump said. “If people were being killed and courts were holding us up, or governors or mayors were holding us up, sure, I’d do that,” he added.
The US president has already authorised the deployment of National Guard troops to Washington, DC, California, and Illinois in recent months. Most recently, he ordered 300 troops to Chicagowhere citizens have been protesting against an Immigration and Customs Enforcement (ICE) crackdown.
Illinois Governor JB Pritzker, a Democrat, strongly opposed the deployment, calling it an “invasion” and saying: “Donald Trump is using our service members as political props and pawns in his illegal attempt to militarise our nation’s cities.”
Pritzker’s administration, along with the city of Chicago, has filed a lawsuit against the federal government in the Northern District of Illinois to block the deployment. “There is no insurrection here,” Pritzker said. “These advances in President Trump’s long-declared ‘War’ on Chicago and Illinois are unlawful and dangerous.”
In Portland, Trump said the situation amounted to “criminal insurrection,” though Oregon Governor Tina Kotek rejected the claim outright. “There is no insurrection in Portland. No threat to national security,” she said.
Trump’s comments on the Insurrection Act followed a weekend of legal setbacks. On October 6, a federal judge in Oregon temporarily blocked his deployment of 200 National Guard troops under a different law, with the restraining order extended through October 18. The court action added to Trump’s frustration with what he sees as judicial and state-level obstruction.
What Are The Legal And Political Hurdles?
If Trump invokes the Insurrection Act, it is unclear whether American courts can stop him. Historically, the US judiciary has been reluctant to challenge the president on matters of national security or emergency powers. This means courts often grant a wide margin of discretion to the executive branch.
However, there are limits to that deference. A recent case in the state of Oregon showed that judges may still step in to examine whether the “facts on the ground” truly justify the use of military force.
Constitutional lawyer Bruce Fein told Al Jazera that using the Insurrection Act in Portland would be “clearly illegal,” even if the courts chose not to intervene. “Congress, however, could impeach and remove Trump for misuse of the Act,” he said.
Fein also stressed that military law obligates personnel to disobey orders that are clearly unlawful. This means that even if the president issues the order, troops are not automatically required to follow it, especially if it contradicts constitutional protections.
Could Trump Use Other Legal Tools?
Apart from the Insurrection Act, Trump has also relied on a different law called Title 10 of the US Code to send military forces into states without needing permission from local governors.
Earlier this year, Trump used Title 10 to deploy troops to California during protests, even though Governor Gavin Newsom strongly opposed the move. Newsom later described the deployment as a “breathtaking abuse of the law and power” and warned that Trump’s use of this authority could soon be challenged before the US Supreme Court.
While Title 10 gives the president limited power over the National Guard in certain cases, using the Insurrection Act would significantly expand his legal latitude.
Karishma Jain, Chief Sub Editor at News18.com, writes and edits opinion pieces on a variety of subjects, including Indian politics and policy, culture and the arts, technology and social change. Follow her @kar…Read More
Karishma Jain, Chief Sub Editor at News18.com, writes and edits opinion pieces on a variety of subjects, including Indian politics and policy, culture and the arts, technology and social change. Follow her @kar… Read More
October 08, 2025, 12:04 is
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