When U.S. Treasury Secretary Scott Bessent vowed to ramp up pressure on Iran by targeting its economic partners, he echoed former President George W. Bush’s warning to American allies after the Sept. 11 attacks.

“You are either with us, or against us,” Bessent said in an interview with CNBC Thursday. “This is going to be the greatest coordinated economic isolation in the history of the world.”

That stark language was meant to underscore Washington’s desire to punish countries that still do business with the Islamic Republic, with Bessent saying he would unveil a plan at a Monday news conference.