President Donald Trump said early Friday his administration is resuming a broad set of tariffs on dozens of countries after a 90-day pause, as trade negotiations with many of those nations have failed to yield new deals.

Speaking to reporters at Joint Base Andrews just after midnight, Trump said letters informing countries of their specific tariff rates will begin going out Friday, with “10 to 12” letters issued each day until all trade partners are “fully covered” by July 9. The new duties are scheduled to begin on Aug. 1 if no deals are reached.