President Donald Trump said at least seven countries can expect tariff letters on Wednesday morning, as he ramped up pressure on nations to strike deals with the United States by saying his new August 1 deadline would not be extended.

President Donald Trump vowed to push forward with his aggressive tariff regime in the coming days, stressing he would not offer additional extensions on country-specific levies set to now hit in early August while indicating he could announce substantial new rates on imports of copper and pharmaceuticals.

The Yale Budget Lab noted that the letters sent Monday would hike the effective tariff rate on U.S. consumers to the highest since 1934.