The US president says he has good relationships with Volodymyr Zelenskyy and Vladimir Putin, but analysts say negotiating an end to the conflict is going to take much more than that.

A victory for Putin means, in due time, a re-charting of the entire map of Europe, to suit his vision of a Russian empire that never lost the Cold War. The only way to end the war in Ukraine is to ensure that Russia loses and that Ukraine wins.