What tariffs has Trump announced and why?
Donald Trump, while president, imposed tariffs on imported goods, arguing it would boost American manufacturing and reduce the US trade deficit. These tariffs, taxes paid by companies importing goods, could increase costs for consumers. Trump also threatened tariffs against allies like the UK and several European countries for opposing a US takeover of Greenland, and against China, Mexico, and Canada to pressure them on migration and drug control. The legality of Trump's tariffs, enacted under the International Emergency Economic Powers Act, was challenged in court, with a US appeals court ruling them mostly illegal in August 2025. The Supreme Court is expected to rule on the case in the coming weeks.