Trump’s Venezuela attack deepens Europe’s Greenland dilemma

Trump's latest threat poses an “existential” challenge to NATO, said Ed Arnold, a senior fellow at the Royal United Services Institute think tank, given there is no precedent for one country launching an outright attack on another within the alliance since its 1949 founding. In a worst-case scenario — a U.S. military incursion — Denmark could unilaterally summon allies for talks about threats to its security, he said, but would then be hamstrung as Washington blocks a military response. That would almost “certainly … mean the end of NATO as we know it,” Arnold said.