U.S. Treasury to Expand Iran Secondary Sanctions, Source Says

The U.S. Treasury is expected to broaden secondary sanctions against entities and countries doing business with Iran, a source told Reuters, as the Trump administration seeks to increase economic pressure on Tehran. The action serves as a final warning to sever ties with Iran. The move aims to force an end to the nearly six-month conflict that has disrupted Strait of Hormuz and Gulf energy exports. Treasury Secretary Scott Bessent will announce details Monday at a press conference, framing the campaign as an "economic D-Day" and warning countries to side with the U.S. or face being cut off from the dollar-based financial system. Bessent is also expected to provide a broader overview of the economic pressure campaign against Iran, which he and President Trump have described in stark terms. The source spoke on condition of anonymity due to not being authorized to speak publicly.