Trump warns countries that 'play games' with US trade deals will face higher tariffs

President Donald Trump threatened nations Monday with punishing hikes on import duties if they choose to "play games" after the US Supreme Court struck down his global tariffs last week. "Any Country that wants to 'play games' with the ridiculous supreme court decision, especially those that have 'Ripped Off' the U.S.A. for years, and even decades, will be met with a much higher Tariff, and worse, than that which they just recently agreed to," Trump wrote on social media. The high court's decision has dealt a sharp blow to Trump's economic agenda, of which tariffs -- and his ability to impose them rapidly -- have been a key feature. For now, US Trade Representative Jamieson Greer has said that he expects partners to "stand by" the tariff deals they have struck with Washington.