Trump Suggests NATO Could Have Been Used to Defend U.S. Southern Border Under Collective Defense Clause

President raises idea of invoking Article 5 in social media post as he criticizes alliance burden-sharing and border security priorities.

By yourNEWS Media Newsroom

President Donald Trump suggested early Friday that the United States could have tested the North Atlantic Treaty Organization’s collective defense commitment by invoking Article 5 to address illegal immigration at the southern border, framing the idea with an element of satire in a social media post.

In a message posted on Truth Social, Trump wrote that NATO might have been compelled to assist the United States by deploying forces to the southern border, potentially allowing U.S. Border Patrol agents to be reassigned to other duties. He quoted Article 5 of the NATO treaty, which treats an attack on one member as an attack on all.

Trump’s remarks referenced NATO’s own definition of collective defense, which the alliance outlines in its explanation of Article 5. Under that provision, member states are obligated to assist one another in response to an armed attack, though the form of assistance is left to each country’s discretion. NATO has invoked Article 5 only once, following the terrorist attacks on the United States on Sept. 11, 2001.

While Trump did not formally call for such an action, his comments came amid continued criticism of NATO’s burden-sharing structure and what he has described as uneven commitments among alliance members. The president has repeatedly emphasized that the United States provides the largest military contribution to NATO and has used that position to press European allies on defense spending and strategic priorities.

In recent weeks, Trump has reasserted U.S. leverage within the alliance and has continued to remind European governments of Washington’s central role as NATO leaders debate future security policies. Those debates include calls from some European officials to extend NATO-style protections to Ukraine, a non-member state, as the war with Russia continues.

Trump has contrasted those discussions with what he characterizes as a lack of comparable support for the United States on border enforcement. He has argued that while European leaders seek expansive collective defense guarantees, they have not provided assistance to address illegal immigration into the U.S.

Questions about the alliance’s future have also surfaced publicly. Former NATO Secretary General Jens Stoltenberg has said he could not guarantee the United States would remain in the bloc, reflecting uncertainty surrounding long-term U.S. participation.

Trump reiterated his broader critique during a speech at the World Economic Forum in Davos on Wednesday, where he sharply criticized NATO’s structure and funding dynamics. Beginning roughly 48 minutes into a video of the address, Trump said the United States has been treated unfairly despite being what he described as the alliance’s most significant contributor.

The comments underscore Trump’s continued focus on border security and his willingness to challenge long-standing assumptions about U.S. alliances as he presses for changes in both immigration enforcement and international defense arrangements.