Donald Trump threatened to impose 10% tariffs on eight NATO countries for sending troops to support Greenland’s sovereignty. The move stirred strong backlash from European leaders. Denmark’s parliamentary defence chair, Rasmus Jarlov, said, “Every insult, threat, tariff and lie that we receive strengthens our resolve. The answer from Denmark and Greenland is final: We will never hand over Greenland.” Trump wants full ownership of Greenland, not just military access. European countries, including close US allies like Italy, called the tariff threat a mistake. The eight NATO countries targeted issued a joint statement warning of a possible trade war if tensions rise. French President Emmanuel Macron is considering EU measures to counter the US move and questioning the EU-US tariff deal from 2025. UK Labour leader Keir Starmer is yet to respond but faces pressure as his US trade deal delays. Denmark’s Prime Minister Mette Frederiksen warned that a US military attack on a NATO country would end the alliance. Former UK official Simon McDonald agreed, saying it would benefit Russia and China. The US desire for Greenland is mainly to monitor Arctic threats from Russia and China. Losing cooperation from Scandinavia, Iceland, and the UK would harm US security. Some see buying Greenland as a precedent, but many view Trump’s push as damaging to European values and NATO unity. Europe stands united, insisting Greenland remains Danish and warning that its sovereignty is non-negotiable.