European nations express alarm over a potential 'dangerous downward spiral' following President Trump's threat of tariffs on Greenland. The move comes as a response to the U.S. president's apparent attempt to leverage tariffs to negotiate control of Greenland, a semi-autonomous territory of Denmark, which he deems crucial for U.S. national security. This development has sparked a heated debate, with European Union ambassadors uniting to counter the threat. They have devised a strategy that includes both intense diplomatic efforts to dissuade Trump and the preparation of retaliatory measures if the tariffs are imposed. The EU's stance is further supported by the potential activation of the 'Anti-Coercion Instrument', a tool designed to limit U.S. access to European markets and investments. The situation has also drawn criticism from various European leaders, including Italy's Giorgia Meloni, who described the tariffs as 'commercial blackmail'. The crisis has even led to a rare unity among British political parties, all of which have criticized Trump's tariff threat. As the situation unfolds, the future of Greenland's sovereignty and the transatlantic relationship hang in the balance, with the potential for a dangerous spiral of economic and political tensions.