President Trump announced tariffs on several NATO allies, primarily Denmark, on January 17, 2026, in response to their refusal to negotiate Greenland's sale to the United States. The measures, detailed in a Truth Social post, target imports from Denmark, Norway, Sweden, and others at 10% starting February 1, potentially rising to 25% by June unless Arctic territory talks advance. 

These duties pressure Europe into reconsidering US access to Greenland's strategic resources against Russia and China. Trump cites a 1951 defense pact to justify expanded American presence, calling European deployments risky.

Denmark deems it "unacceptable," EU officials prepare for trade fallout, and protests surge in Greenland. US Democrats push congressional blocks as the Supreme Court eyes legality amid transatlantic tensions.