Can a Labour prime minister get on well with a Republican US president? Or a Conservative PM with a Democrat in the White House? Although there's understandably nervousness in 10 Downing Street about how Sir Keir Starmer and Donald Trump will get on, the short answer is yes, absolutely. "I take every challenge as it comes and I've got - and I hope I've established - a good relationship with president-elect Trump," Sir Keir told Sky News in Ukraine last week. Earlier, at last week's cabinet meeting, when discussions inevitably turned to the US-UK relationship, the PM spoke of his...