Countries that have not received a prior letter on tariffs from Trump or negotiated a trade framework will be notified of their likely tariff rates, Leavitt said, either in the form of a letter or Trump’s executive order. At least two dozen countries were sent letters setting out their tariff rates.

President Donald Trump announced a new trade deal with South Korea, which calls for 15% tariffs on goods from there.

President Trump, who has insisted Aug. 1 is a firm deadline for countries around the world, said that "the complexities of a Deal with Mexico are somewhat different from other Nations."