Unfortunately for Trump’s imperial ambitions – but fortunately for the rule of law, the U.S. national interest, and international stability – Trump’s ability to execute any act of military aggression against
Greenland is constrained by an additional statute:
22 U.S.C. 1928f. This statute – which was not applicable to Venezuela because it is not a NATO member — was adopted by Congress pursuant to Section 1250A of the 2024 National Defense Authorization Act and was designed to prohibit the president from materially altering the U.S. government’s relationship with NATO and the North Atlantic Treaty (the diplomatic instrument that gave rise to NATO) without prior congressional approval.
In addition to its consultation and notification requirements, the statute – which is titled “Limitation on Withdrawal from the North Atlantic Treaty Organization” – contains two principal provisions: first, as the title implies, a broad prohibition against withdrawal from NATO or taking other analogous steps that would materially damage the U.S. relationship with the organization and, second (and critically), a limitation on the use of appropriated funds such that the president would be precluded from using such funds to implement the actions prohibited by the statute.
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The applicability of this statute stems from Greenland’s status as an autonomous territory within the Kingdom of Denmark and Denmark’s status as a member of NATO. As Mike Schmitt has
explained, “[i]t is clear that Greenland falls within the geographical coverage of Article 5.”
While the administration will undoubtedly claim that, because it has no intent to formally “withdraw” from the North Atlantic Treaty, the statute is not applicable to the current situation, this assertion would be false. A U.S. attempt to seize Greenland militarily would constitute an attack on Denmark and, through the operation of
Article 5 of the North Atlantic Treaty, an attack on each of the other 30 NATO members (excluding of course the U.S.). Not only would this attack instantaneously breach, either directly or constructively, each of the four prohibitions in clause (a) of Sec. 1928f (meaning it would invariably constitute or lead to the suspension, termination, denunciation, and withdrawal of the U.S. from the Treaty), it would necessarily also lead to the
destruction of the organization in its current form as the U.S. wages war on our former allies.
Because these consequences are inevitable, any order by President Trump to launch an attack on Greenland necessarily triggers the automatic cutoff of authorized or appropriated funds that would be required to execute the assault. In addition, because the administration has clearly not only engaged in “deliberation” about taking military action against Denmark and NATO, but, indeed, has reportedly already ordered that military planning be
initiated, the consultation and notification requirements of Sec.1928f have already been triggered.
