President Trump has issued a stark ultimatum to European leaders, threatening to impose heavy tariffs unless they allow the United States to acquire Greenland. European leaders have rejected the demand, with some proposing strong retaliatory measures, including restricting access for American companies to the European market. The escalating standoff has prompted emergency meetings among European officials and sparked protests in Greenland and Denmark, where citizens feel betrayed and alarmed by the threats. As Europe weighs its response, the crisis is testing the limits of trans-Atlantic relations and could mark a turning point in how Europe confronts American pressure.