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.

The 14 countries sent letters so far, which included smaller US exporters like Serbia, Thailand and Tunisia, hinted at opportunities for additional negotiations while at the same time warning that any reprisal steps would be met with a like-for-like response.

President Donald Trump sent out tariff letters to U.S. trading partners on Monday as he had promised, starting with missives to Japan and South Korea before targeting Malaysia, South Africa and other countries.