In a bold trade action Trump Set to Send Tariff Ultimatums as July 9 Deadline Looms. In a dramatic shift poised to redefine U.S. trade relations, President Donald Trump has announced that his administration will issue unilateral tariff letters to key U.S. trading partners within the next two weeks. The move comes as the July 9 tariff deadline looms, ending a 90-day pause that was instituted following global market chaos in April.