Keir Starmer and Donald Trump shake hands at a joint press conference in the East Room at the White House in February.Keir Starmer has said a global trade war “is in nobody’s interest” as the world waits to find out the details of Donald Trump’s tariff plan.The US president will make his announcement at 9pm in a special “liberation day” press conference.He has already unveiled plans to slap tariffs – taxes on imports – on foreign steel, as well as a 25% surcharge on cars built abroad.However, he could also impose a blanket 20% tariff on all goods entering America from abroad.Canada and the EU, who have already been told they face tariffs by Trump, have said they will retaliate with import taxes of their own.However, Starmer has so far refused to follow suit as the government is trying to negotiate an economic deal with the US.The prime minister told the Commons on Wednesday: “A trade war is in nobody’s interest and the country deserves, and we will take, a calm, pragmatic approach.“That is why constructive talks are progressing to agree a wider economic prosperity deal with the US.