Danish Prime Minister Mette Frederiksen has called on U.S. President Donald Trump to stop making threats about taking control of Greenland. Her remarks came after Katie Miller, wife of Trump aide Stephen Miller, posted a map on social media showing Greenland in U.S. flag colors with the caption “soon.” Frederiksen said there is no justification for the United States to claim any of the three territories under the Danish Kingdom and emphasized that Denmark, as a NATO member, includes Greenland within the alliance’s security framework.

Frederiksen noted that Denmark already has a defense agreement with the United States granting access to Greenland and that her government has increased investment in Arctic security. She urged Washington to stop threatening a close ally whose people have clearly stated they are not for sale. Hours later, Trump reiterated aboard Air Force One that the U.S. needs Greenland for national security and that Denmark cannot prevent it.

The dispute follows the U.S. appointment of a special envoy to Greenland in December 2025, which angered Denmark. Most of Greenland’s 57,000 residents oppose becoming part of the United States despite some support for eventual independence from Denmark.