Donald Trump’s second-term foreign policy has alarmed allies, with aggressive moves on Greenland, Gaza and Europe marked by tariffs, leaked messages and symbolic intimidation. As Europe weighs retaliation, critics warn his pressure-driven approach is straining NATO and redefining US power as coercive rather than diplomatic. Donald Trump’s second-term foreign policy has alarmed allies, with aggressive moves on Greenland, Gaza and Europe marked by tariffs, leaked messages and symbolic intimidation. As Europe weighs retaliation, critics warn his pressure-driven approach is straining NATO and redefining US power as coercive rather than diplomatic.