Trump raises tariffs to 15% on imports from all countries

President announced increase from 10% using different authority from mechanism that supreme court struck down on Friday

Donald Trump announced on Saturday that he would raise a temporary tariff rate on US imports from all countries from 10% to 15%, less than 24 hours after the US supreme court ruled against the legality of his flagship trade policy.

Infuriated by the high court's ruling on Friday that he had exceeded his authority and should have got congressional approval for the tariffs he introduced last year under the International Emergency Economic Powers Act (IEEPA), the US president railed against the justices who struck down his use of tariffs - calling them a disgrace to the nation" - and ordered an immediate 10% tariff on all imports, in addition to any existing levies, under a separate law.