By Jeff Mason, Bart H. Meijer and David Brunnstrom WASHINGTON/BRUSSELS (Reuters) -U.S. President Donald Trump opened a new phase on Monday in the trade war he launched this year, telling partners, from powerhouse suppliers such as Japan and South Korea to minor players,

The US plans to impose a 25% tax on products entering the country from South Korea and Japan on 1 August, President Donald Trump has said.He announced the tariffs in a post on social media, sharing letters he said had been sent to leaders of the two countries.