U.S. troops deployed in certain defense areas along the southern border may have the authority to make arrests, according to a new legal opinion from the Department of Justice that supports a key piece of President Donald Trump's border strategy.
The opinion, drafted by the Office of Legal Counsel (OLC) and published on August 14, concludes that the military does not violate the ''Posse Comitatus Act'' by arresting individuals suspected of committing crimes within a designated National Defense Area.
Federal legislation generally limits the involvement of the Armed Forces in law enforcement tasks within the United States. However, the OLC determined that these restrictions do not prevent the military from performing certain functions directly related to the protection of defense facilities and properties.
The ruling thus provides a new legal backing for Trump's policy of using the Armed Forces to bolster border security and hinder illegal crossings.
The United States Department of Justice issued a new opinion supporting Trump's strategy to carry out arrests along the border with Mexico
Trump issued a presidential memorandum last year ordering the establishment of National Defense Areas in various sectors of the border. Since then, the federal government has designated six of these zones in California, Arizona, New Mexico, and Texas.
The OLC explained that the ''Posse Comitatus Act'' does not necessarily prohibit military actions that primarily target national defense or military matters, even when those actions may have an incidental effect on law enforcement.
''Primarily military or foreign affairs actions'' may fall outside the restrictions of the legislation when not conducted for the purpose of enforcing civil laws, the office noted.
Thomas Elliot Gaiser, Deputy Attorney General for the Office of Legal Counsel of the Department of Justice
The analysis also relies on the historical authority of military commanders to maintain order within facilities under their control. According to the OLC, U.S. base commanders have traditionally had the capacity to prevent unauthorized entry and detain individuals who invade military properties.
The legal office further concluded that troops may arrest individuals who are ''just outside'' a military facility when the detention is related to an offense committed within the property.
This interpretation takes on special importance in the border zones designated by the Trump administration, where authorities seek to enhance protection of strategic areas for national defense.
Federal legislation establishes that unauthorized entry into a military facility constitutes a misdemeanor that can carry up to six months in prison and a $500 fine. Violating certain security regulations related to defense properties can be punished with up to one year in prison and a fine of up to $100,000.
The OLC also determined that the armed forces can carry out arrests "just outside" a military facility
The Trump administration has advocated for greater military involvement at the border as part of a strategy aimed at regaining control of areas where illegal crossings and other border security-related activities occur. The new ruling provides a clearer legal basis for troops to respond to certain violations within the designated areas.
The ruling comes as the Trump administration continues to expand the role of the Armed Forces in border security. For the government, the measure allows for more effective protection of strategic facilities and lands and responding to intrusions without turning the military into a general police force.
With the legal backing of the OLC, the Trump administration gains greater clarity on the circumstances under which the military can make arrests. The ruling thus reinforces the president's strategy of using available federal resources to strengthen border security and protect critical areas for the defense of the United States.
President Donald Trump has endorsed greater military intervention in the protection of the southern border of the United States
