The PM has a duty to pull any levers he can to ameliorate the president-elect’s global impact. And the war-gaming is well under way

Dawn had barely broken, and nor had Kamala Harris publicly conceded, when Keir Starmer tweeted his congratulations to the not-quite-officially President-elect Donald Trump.

Britain would, he said, stand “shoulder to shoulder” with its old ally, as it always does. Though he got the early opportunity he wanted to congratulate the new president-elect even more fulsomely down the phone, those words will have been gut-wrenching for many people. How can it be business as usual, with a president whose own former chief of staff said he met the definition of a fascist? What on earth makes Starmer think he can influence Trump for the better, the usual rationale for engaging with unsavoury leaders, where Trump’s own advisers repeatedly failed? The only people he ever really heeded, the British-born former White House adviser Fiona Hill once told one of Theresa May’s aides, were the now late Queen and the pope.