President Trump said the U.S. will impose steep levies on imports from 14 countries starting next month, heightening pressure on trading partners.

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 Japan and South Korea that 25% tariffs will be imposed starting Aug. 1 on goods sent to the United States.