Keir Starmer is travelling to the White House for a high-stakes meeting. But will he have any influence over the US president? Patrick Wintour reports

It’s the most important international relationship the UK has, and for decades has been referred to as “special”. Since the second world war, the UK and the US have considered themselves the closest allies, working together for shared values, with any resentments, differences of opinion or cross words kept to private channels.

But now Donald Trump is back and he seems keen to throw the usual world order of alliances and enmities into chaos. Keir Starmer’s first meeting with the US president comes at a crucial juncture for Europe, with the future of Ukraine in the balance. “The stakes at the moment could not be higher,” says the Guardian’s diplomatic editor, Patrick Wintour.