The geopolitical fallout of a Ukrainian defeat would depend on the shape of any peace settlement. This in turn would hinge on military dynamics or the mindset of Mr Trump, should he be elected again. A defeat of Ukraine would be a humbling episode for the West, a modern Suez moment. Having provided moral, military and financial succour to its ally for two years now, America and Europe have perhaps inadvertently put their own credibility on the line. That they have sometimes dithered in delivering this support would make things worse, not better: further confirmation, among sceptics of liberal polities, that democracies lack what it takes to stand up for their interests. Will Amaerica lose its global influence if Ukraine is defeated ?

