The new Greenland security agreement gives the United States unprecedented military access to the Arctic island without resolving the central question that has shadowed the deal: who ultimately controls Greenland’s future?

Supporters present the pact as a strategic breakthrough. The White House called it “critical for American national security and defense in the Arctic Region,” while the agreement permits expanded U.S. operations at Pituffik Space Base and potential new bases at Narsarsuaq and Mestersvig.¹ Secretary of State Marco Rubio described it as “a huge win for the United States,” arguing that it permanently protects American Arctic interests “at zero cost to the U.S. taxpayer.”Secretary Marco Rubio (SecRubio)²

The agreement also reflects growing concern about Russia and China. It bars non-NATO countries from establishing bases on Greenland without approval from the three parties and tightens scrutiny of foreign investment. Rubio said the pact creates an “unprecedented deal” that strengthens U.S. security in the Arctic.Secretary Marco Rubio (SecRubio)³

But the text preserves Greenland’s formal status within the Kingdom of Denmark and affirms Greenland’s right to self-determination. Danish Prime Minister Mette Frederiksen said it respected both the kingdom’s “territorial integrity” and Greenland’s future choices.⁴ Greenlandic Prime Minister Jens-Frederik Nielsen likewise said the island recognized the long-term security threat and that the agreement should settle doubts about Greenland’s loyalties.⁴

The tension lies in the gap between those assurances and President Trump’s language. He said the pact gives Washington “permanent control over security and all other needs” on Greenland, with authority to prevent adversaries from establishing a presence or making sensitive investments.⁴ In practice, the deal expands American control; politically, it leaves sovereignty intact. That ambiguity may secure cooperation for now, but it does not end the dispute over Greenland’s autonomy—or Trump’s ambitions.