As the US president leaves Russia and Ukraine to sort a ceasefire among themselves, Sean O’Grady asks if this is Trump’s famously short attention span at play – or whether he is merely reluctant to be associated with near-certain failure

The delegation of European leaders who will fight Zelensky’s corner as the US president decides Ukraine’s fate could still play a blinder – but however heartening the show of solidarity, they are but supplicants, says Sean O’Grady