President Trump has announced he is increasing his global tariff rate to 15%, in response to the ruling by the US Supreme Court that struck down his original import duties on global partners. The court decided yesterday that he had exceeded his powers by using emergency laws to implement his original tariffs last year. His response was to call some of the justices 'fools' and confirm a ten per cent tax on all imported goods. Democrat governors have called for refunds on levies already paid.