Little-known abroad, Andy Burnham has a chance to define a new era of US-UK relations. Should he seek to charm or bargain with the bully in the White House – or treat him ‘like a poorly informed constituent’?

Foreign Office insider warns him not to make the same mistake as Keir Starmer by 'backing the wrong horse'

Little-known abroad, Andy Burnham has a chance to define a new era of US-UK relations. Should he seek to charm or bargain with the bully in the White House – or treat him ‘like a…