As Trump’s time runs out, this could be his most dangerous legacy: a world divided into three | Steve Bloomfield

We've heard much about the end of the west. At the proposed summit between Trump, Putin and Xi, those fears could crystallise

In the final two years of a US presidency, when Congress has been lost, approval ratings have sunk like a stone and their party has started to think about who's coming next, the person occupying the Oval Office can feel their power draining away. Domestic legislation, particularly in an era where bipartisan cooperation is almost nonexistent, grinds to a halt. But as the days tick by until the end, and as presidents begin to think about their legacy, there is one part of the job where they still have power: the rest of the world.

In the final weeks of his presidency in 1992 George HW Bush sent 28,000 American troops to Somalia to help end a famine. For Bill Clinton, it was a quixotic attempt to bring peace to the Middle East by ending the Israeli-Palestinian conflict. Barack Obama restored diplomatic ties with Cuba, making a historic visit to Havana, as well as a final, successful push on the Iran nuclear deal.