President Donald Trump warned on Monday that the United States will impose “substantial” new tariffs on any country that keeps digital services taxes or related measures he says discriminate against American technology firms. The threat came in a post on Truth Social dated Aug. 26, where Trump wrote that all nations with such levies are “on notice” and must remove them or face higher duties on their exports to the United States. Trump added that Washington is prepared to block exports of advanced U.S. technology and semiconductor chips to those countries, declaring that the United States will “institute Export restrictions on our Highly Protected Technology and Chips” if the taxes remain in place. He did not specify which nations would be targeted or outline a timeline for the potential measures. Digital services taxes adopted in recent years by several governments have been a recurring flashpoint with Washington, which argues they unfairly single out U.S. companies. Trump’s latest warning signals a fresh escalation in the dispute as the White House weighs broader trade and technology controls to protect domestic industries.