President Donald Trump sparked debate after posting on this threat:
“Maybe we should have put NATO to the test: Invoked Article 5, and forced NATO to come here and protect our Southern Border from further Invasions of Illegal Immigrants, thus freeing up large numbers of Border Patrol Agents for other tasks.”
Donald J. Trump Truth Social Post 08:27 PM EST 01.22.26 pic.twitter.com/RpnLHvHHjZ
— Commentary Donald J. Trump Posts From Truth Social (@TrumpDailyPosts) January 23, 2026
Trump’s remark comes amid his ongoing focus on immigration and border security, including recent statements touting record enforcement numbers and construction on the border wall. The president framed his suggestion as a way to bolster U.S. border security while freeing domestic agents for “other tasks.”
However, legal and diplomatic experts point out that Article 5 of the North Atlantic Treaty—the so-called mutual defense clause—does not apply to immigration issues. Article 5 is triggered only in response to an armed attack against a NATO member and has only been invoked once, following the September 11, 2001, terrorist attacks.
Under the treaty, NATO allies must consult collectively and take actions they deem necessary to restore security, which could include military operations. But the clause does not legally compel NATO to act in response to domestic issues such as migrant crossings. Experts say invoking Article 5 in this context would almost certainly be dismissed as outside the alliance’s mandate.
In practical terms, even if the U.S. were to formally attempt to invoke Article 5 over immigration enforcement, NATO would likely treat it as a political gesture rather than a legal obligation. No treaty mechanism exists to “force” allies to deploy troops or resources to assist with domestic border operations.
Trump’s post reflects his long-standing emphasis on tough border policies, while simultaneously highlighting a controversial and legally unconventional approach to international alliances so he can use up his border patrol agents for other endeavors.
