In letters so far to 14 countries, including smaller exporters to the United States such as Serbia, Thailand and Tunisia, Trump hinted at opportunities for additional negotiations, even while warning that reprisals would draw a like-for-like response.

President Donald Trump on Monday placed a 25% tax on goods imported from Japan and South Korea, as well as new tariff rates on Malaysia, Kazakhstan, South Africa, Laos and Myanmar.

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.