Why has Keir Starmer ruled out economic retaliation against Donald Trump’s new tariff threat over the US purchase of Greenland?

And what options does it leave him and other world leaders to persuade the US president not to bring in 10% tariffs on 1 February for Denmark, Norway, Sweden, France, Germany, the UK, the Netherlands, and Finland?

Tom Bradby and Robert Peston discuss the fallout from Trump’s latest jaw-dropping power play in this special edition of Talking Politics.

Got a question for the team? Email talkingpolitics@itv.com