A protestor outside the US supreme court, which is hearing arguments on the legality of the Trump Administration's tariffs. Photograph: Andrew Harnik/Getty ImagesUS supreme court justices on Wednesday appeared sceptical of Donald Trump’s use of emergency powers to impose a series of tariffs in a closely watched hearing in Washington. The case was brought by groups of US businesses, who were joined by 12 US states, that argued they had been harmed by Mr Trump’s tariffs. Mr Trump has framed the case as existential. But other conservative members challenged Mr Trump’s use of IEEPA, which no other president has invoked to impose tariffs.
