US President Donald Trump has signed a landmark security agreement with Denmark and Greenland, expanding America’s military presence on the Arctic island. The deal, inked at the UN General Assembly alongside Danish Prime Minister Mette Frederiksen and Greenland’s Prime Minister Jens‑Frederik Nielsen, explicitly ties Greenland’s defence to NATO commitments.

The pact strengthens Washington’s Arctic strategy, but it also raises questions about Trump’s repeated criticism of NATO as a “paper tiger.” While the agreement deepens US ties with Denmark and Greenland, it simultaneously reinforces NATO’s role in Arctic defence — complicating Trump’s stated desire to reduce reliance on the alliance.

Analysts note that the deal highlights Trump’s balancing act: expanding US influence in the Arctic while questioning NATO’s relevance. The agreement ensures NATO’s involvement in Greenland’s security, making any potential US exit from the alliance more complex.

For Trump, the Greenland pact is both a strategic win and a political dilemma. It bolsters US military reach in a region increasingly contested by Russia and China, yet it ties America closer to the very alliance he has criticised.

The coming months will reveal whether Trump’s Arctic ambitions can coexist with his skepticism of NATO — or whether this deal marks a turning point in US‑NATO relations.