President Donald Trump said on Wednesday the U.S. will probably "live by the letter" on tariffs with Japan and may have another trade deal coming up with India, following his announcement of an accord with Indonesia on Tuesday.

"Other trading partners observing these threats will have the same mistrust of the negotiation process," experts argue.

In April, Trump announced a 25% tariff on U.S. imports from South Korea as part of his broader “Liberation Day” trade package targeting dozens of countries.

President Donald Trump sent out letters to nations that haven't entered into trade agreements with the U.S., informing them of their new tariff rates.

The U.S. will impose tariffs of 25% on Japan and South Korea beginning on Aug. 1, President Donald Trump announced on Monday in posts on Truth Social.

The letters warned the countries to not retaliate by increasing their own import taxes, or else the Trump administration would further increase import taxes.

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 issued separate letters to the president of South Korea and Japan's prime minister on Monday, saying the U.S. will start charging a 25% tariff on Aug. 1.

The Trump administration is stepping up pressure on trading partners to quickly make new deals before a Wednesday deadline, with plans for the United States to start sending letters Monday warning countries that higher tariffs could kick in Aug.

Tesla tumbled nearly 7% for the biggest drop among S&P 500 stocks as the feud between CEO Elon Musk and President Donald Trump reignited over the weekend. Musk, once a top donor and ally of Trump, said he would form a third political party in protest over the Republicans’ spending bill that passed last week.

"It’s all going to be the same for everyone," the president told reporters of the U.S. duty those countries will face.