After Donald Trump threatened Russia with secondary tariffs of 100% if there was no progress on a Ukraine peace deal within 50 days, he spoke about the role his conversations with Melania Trump had had in highlighting Vladimir Putin's duplicity about the war. The US president said: 'My conversations with him are always very pleasant ... But what I do say is that at a certain point, you know, ultimately talk doesn't talk. It's got to be action'

• Ukrainians hail Melania Trump after president’s change of tack over Russia