Trump has already sent out roughly two dozen letters informing individual trading partners like the European Union, Japan, and South Korea of the tariff rate they will face effective August 1, Politico also said.

For most world leaders, tariff letters from US President Donald Trump mean a big headache. But for one Southeast Asian general, the communique is being spun as welcome recognition of the embattled, isolated and reviled junta he leads.

President Trump has taken an unconventional approach to trade negotiations by sending form letters to foreign leaders.

The letter cites a draft sent to the US in May, listing the areas of negotiation that could help find a solution that would please both countries. The document remains unanswered.

US President Donald Trump has announced that all imports from the EU and Mexico will have a 30% tariff as of August 1. He sent letters to EU President Ursula von der Leyen and Mexico’s President Claudia Sheinbaum informing them of the new rates, which were also posted on his Truth Social account on Saturday.

Letters went to 23 other American trading partners this week, including Canada, Japan and Brazil, setting blanket tariff rates ranging from 20 percent

It’s a possible sign that President Donald Trump’s wave of tariff letters is again raising concern among investors.

Canada is one of the United States' top trading partners, with more than $410 billion of goods crossing into the country last year.