Oil prices fell to more than a one-week low on Tuesday, with Brent crude down 3% to $89.40 a barrel and U.S. West Texas Intermediate off 3.2% near $82.32, as investors looked past supply risks and focused on Washington’s intensifying economic campaign against Iran. The White House has framed the drive as an “economic D-Day,” with Treasury Secretary Scott Bessent calling it the single greatest financial offensive ever, while fresh sanctions target Tehran and so-called enablers that still trade with the country. Iranian Economy Minister Ali Madanizadeh said Tehran is fully prepared to withstand further U.S. measures and has a two-year plan to manage them. China, Iran’s largest oil customer, reiterated opposition to unilateral sanctions and said it would do everything necessary to safeguard its rights and interests. Defense Secretary Pete Hegseth kept military options open even as a New York Times report said the State Department was preparing to return evacuated U.S. diplomats to the Middle East, and BBH strategists described the latest U.S. steps as more warning shot than decisive blow because immediate secondary sanctions on third countries were not imposed.