Since returning to office in January 2025, President Trump has pursued American acquisition of Greenland—the world's largest island and an autonomous territory of Denmark—triggering an ongoing diplomatic crisis. Trump first floated the idea in 2019, but in 2025 and early 2026 he refused to rule out military force or economic coercion, threatened 25% tariffs on European goods unless Denmark relinquished the island, and dispatched senior officials to advance the effort. At the World Economic Forum in Davos in January 2026, Trump publicly pulled back from threats of force or tariffs and described a 'framework' for a future arrangement after meeting with NATO Secretary General Mark Rutte, though no agreement was announced. Denmark and Greenland have repeatedly stated the island is not for sale; Greenland's prime minister Jens-Frederik Nielsen has reaffirmed Greenlandic self-determination. Greenland is strategically important for Arctic military positioning, rare earth and mineral resources critical for technology and defense, and new shipping routes opened by melting ice. The episode has sparked debate about American territorial ambitions, NATO cohesion, alliance relationships, and whether 19th-century-style territorial expansion has any place in 21st-century geopolitics.
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