President Trump on Monday issued a flurry of letters informing countries of their new tariff rates, which were slated to go into effect on Aug. 1. The letters, published on Truth Social, say that the U.S. will be enacting anywhere from 25% to 40% tariffs.

President Donald Trump cranked up the pressure on two of America’s key trading partners, Japan and South Korea, firing off letters Monday to the heads of their countries that informed them of their new tariff rate.