As they watched Ukrainian President Volodymyr Zelenskiy evicted from the White House last week after an unprecedented live televised quarrel with President Donald Trump and his Vice President JD Vance, some of America’s closest allies began to swiftly reappraise decades of foreign and defence policy. It was a process that, if anything accelerated, this week as the U.S. suspended military aid and then intelligence support to Kyiv, reportedly turning U.S. transport planes around in flight and reducing Ukraine’s early warning of Russian drone and missile strikes.