Diplomacy in Davos and calming Trump

Keir Starmer has played down the possibility of retaliatory tariffs on the US, after Donald Trump threatened them against Nato allies unless they support his plan to take Greenland. At an emergency press conference, Starmer said tariffs would be the “wrong thing to do”. Lucy Hough speaks to the Guardian’s senior political correspondent, Peter Walker – watch on YouTube. Help support our independent journalism at theguardian.com/infocus