US President Donald Trump said countries supplying Iran with weapons will face immediate 50% tariffs with no exemptions on their imports on Tuesday, just hours after agreeing to a two-week ceasefire with Tehran.
“A country supplying military weapons to Iran will be immediately tariffed, on any and all goods sold to the United States of America, 50%, effective immediately, There will be no exclusions or exemptions! President DJT,” Trump wrote in a Truth Social update.
Trump did not specify which countries would face the tariffs nor whether Russia would be included, despite reports that it had shipped drones to Iran in March.
Trump also did not specify the legal authority under which he would impose the measures. His ability to enact broad global tariffs was challenged in February, when the US Supreme Court struck down his use of the International Emergency Economic Powers Act (IEEPA), prompting a lower court to order about $166 billion in refunds over a year.
While China and Russia have blocked a US-backed UN resolution to reopen the Strait of Hormuz, they have denied any recent collaboration in supplying weapons to Iran. However, they acknowledged having previously supported Iran’s military capacity by supplying missiles, air-defense systems and technology.
US imports from Russia – one of the few countries not targeted by Trump’s “reciprocal tariffs” – rose 26.1% to $3.8 billion in 2025, according to Reuters. The increase was driven largely by palladium used in catalytic converters, along with fertilizers and enriched uranium for nuclear reactors.
The US Commerce Department is said to have proposed punitive tariffs on Russia following an anti-dumping probe.
Separately, Washington has also moved to delist certain sanctioned Russian ships on March 31.