Summary:

President Trump, Danish Prime Minister Mette Frederiksen, and Greenland's Prime Minister Jens-Frederik Nielsen signed a trilateral agreement giving the United States permanent security control over Greenland, described by the administration as coming at no cost to U.S. taxpayers.

Key terms of the deal:

• Grants the U.S. permanent basing rights and control over security matters in Greenland.
• Bars any U.S. adversary from establishing a military presence, base, or sensitive investment in Greenland without American approval.
• Explicitly preserves Danish sovereignty over Greenland and Greenland's right to self-determination, building on the 1951 U.S.-Denmark Defense of Greenland Agreement.

International reactions:

• Danish PM Frederiksen called it a historic expansion of 75 years of U.S.-Denmark defense cooperation.
• Greenland's PM Nielsen affirmed Greenland's alliance with the U.S., calling the deal historic.
• NATO Secretary General Mark Rutte and European leaders (von der Leyen, Merz, Meloni, and Nordic/Baltic officials) welcomed the agreement as strengthening Arctic and NATO security.
• Secretary of State Marco Rubio and other U.S. officials framed it as a permanent resolution of U.S. security concerns in the Arctic, countering Russian and Chinese influence in the region.

Domestic political reaction: Numerous Republican senators, House members, and conservative commentators praised the deal as a major foreign policy win, often comparing it to the historic Alaska purchase and linking it to other administration actions (the Panama Canal, Venezuela oil agreements) as part of a broader Western Hemisphere security strategy. Some described it as fulfilling long-standing interest in U.S. control over Greenland dating back to the Truman administration.

Note: This is a compilation of official reactions and administration framing; the characterizations of the deal's significance and historical comparisons reflect the views of the quoted officials and commentators rather than independent analysis.