The row in the Oval Office between President Zelensky and President Trump has brought the geopolitical nightmare scenarios conjured during last month’s Munich Security Conference closer to reality: an American withdrawal from Europe, a breakup of Nato, even a closer ideological affinity between Washington and Moscow than with its traditional allies. The question of whether Ukraine can continue to defend itself against Russia’s invasion without US support is now an immediate concern.

Whether this was a deliberate ambush in the White House or Zelensky mishandling a thin-skinned president does not, in this specific context, matter. President Trump is not a person likely to allow this defiance to pass unpunished.

There are reports that he is contemplating a halt to military aid; recent shipments were initiated