Rachel Ziemba warns that escalating US tariff threats linked to Greenland and Arctic security risk reopening the U.S.-EU trade truce, undermining European investment in the United States and adding fresh uncertainty for global businesses. She says legal questions around the Trump's tariff authority, combined with geopolitical tensions and resource ambitions in the Arctic, are heightening risks for trade, investment and alliance stability.
Trump 'lashing out' abroad as he faces pressure at home, says Ziemba Insights
