President Trump has threatened to impose tariffs of 25% to 40% on imports from 14 countries, including Bangladesh, Indonesia, Japan, South Korea and Thailand. On Monday, Trump used his social media platform Truth Social to publish letters to leaders of nations targeted by the tariffs, which Trump said would take effect on August 1 unless countries negotiate new trade deals with the U.S. That amounts to a three-week extension of Trump’s original July 9 deadline to strike a deal or face higher tariffs.