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,

President Trump said Japan and South Korea would face tariffs of 25 percent unless they reached an agreement with the United States. Other countries received notice of higher levies.

President Donald Trump announced tariffs of 25% on goods from Japan and South Korea beginning on Aug. 1, as he moved to impose unilateral rates on countries that have not yet secured trade deals with his administration.