Donald Trump speaks in the Oval Office below a portrait of Ronald Reagan.Donald Trump has said he “couldn’t care less” if his tariffs push up the prices of foreign cars in America.In comments which will increase fears of a global trade war, the US president also said the swingeing import taxes he is bringing in will be permanent.Trump has said he plans to impose 25% tariffs on all foreign-built cars imported into the States from April 2.The move is designed to boost the American car industry by reducing demand for foreign vehicles.Britain currently sells more than £6 billion-worth of cars to the US, meaning the policy could have a major impact on the UK economy.In addition, Trump wants to impose tariffs on steel imports and on all countries, like the UK, which charge VAT.Chancellor