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,

Donald Trump has revived his threat to hit major trading partners with steep “reciprocal” tariffs even as he granted a three-week reprieve for countries to negotiate trade deals with the US.