U.S. President Donald Trump has ramped up his trade war this week, threatening sharply higher tariffs on 14 countries starting August 1 as his administration aims to finalize agreements with others. Despite promises to work on 90 deals in 90 days,

Trump said on Monday he would impose the tariff on goods from South Korea starting on August 1, posting a letter to President Lee Jae Myung on his social media platform along with one to Japan's leader.

President Donald Trump unveiled a wave of letters again threatening key trading partners with high tariff rates even as he delayed the increased duties until Aug. 1 and suggested that he was still open to negotiations.