President Trump has threatened to hit more than a dozen nations with steep import duties by next month. Mr. Trump initially posted two nearly identical letters on Monday, addressed to Japanese Prime Minister Shigeru Ishiba and South Korean President Lee Jae-myung,

The U.S.’s closest security allies in Asia, along with six Southeast Asian countries, have been given another three weeks to negotiate trade deals — or face higher tariffs.

President Donald Trump on Monday informed seven nations, including Japan and South Korea, that new tariffs of at least 25% will be imposed starting Aug. 1 on most goods sent to the United States.