WASHINGTON -- US President Donald Trump’s administration is promising a new phase of economic pressure on Iran, with Treasury Secretary Scott Bessent suggesting Washington will announce measures next week unlike anything previously used to isolate a country economically.What those measures will be is unclear. But experts who spoke to RFE/RL said truly unprecedented action could mean moving beyond another round of sanctions against Iranian companies and targeting the international financial and commercial networks that have helped Tehran keep selling oil despite decades of US pressure.That could include Chinese banks, yuan-denominated payments for Iranian oil, alternative payment systems, and the shipping, insurance, refining, and financial intermediaries behind the trade."Watch this space for more announcements coming next week because we are going to apply measures like have never been seen in the history of economic isolation on a country," Bessent said in an August 13 interview with Newsmax. He said the measures would form part of a "one-two punch" alongside the continued blockade of Iran's ports.Trump amplified the remarks the following day by sharing a Newsmax report on them on Truth Social.The White House has provided few details. Asked on August 14 about the expected action, spokeswoman Karoline Leavitt said “there are more tools at our disposal that we can use to continue punishing Iran and crippling their economy, which is in a very weak spot as it is right now."