US vows "toughest sanctions in history" on Iran, warns allies of economic consequences

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US vows "toughest sanctions in history" on Iran, warns allies of economic consequences
Trump threatens "most crushing" economic measures against Iran as Middle East war enters sixth month
ContinuationU.S. threatens Iran with "economic isolation like the world has never seen" as naval blockade tightens in Strait of Hormuz
The United States will impose the “toughest sanctions in history” on Iran, Treasury Secretary Scott Bessent said on Thursday, framing the measures as part of a broader economic campaign to “collapse this regime” in Tehran.
President Donald Trump warned that any country allowing its financial institutions, businesses, airports or government entities to provide “any type of lifeline to Iran” would face “tremendous economic consequences.” Bessent echoed the call, urging allies to choose sides. “You are either with us or against us,” he told CNBC. Iran’s Foreign Ministry condemned the sanctions as “economic terrorism” and “a crime against humanity,” adding that those imposing them “deserve prosecution for committing heinous crimes against the Iranian people.”
The U.S. has also targeted individuals and entities linked to Iran and Hezbollah with new sanctions, according to an OSINT report. Bessent said details of the broader measures would be announced at a press conference on Monday, describing the approach as a “one-two punch” combining a naval blockade with the new sanctions. He suggested the economic pressure could reduce the need for large-scale military operations, as the war with Iran nears its six-month mark.
Trump’s threats extend to allies that have mediated peace talks, with Bessent urging China to “get with the programme.” China, which buys over 80% of Iran’s shipped oil according to 2025 Kpler data, has called for political and diplomatic solutions. “Sanctions and pressure do not help resolve the problem,” a Chinese embassy spokesperson in Washington said. Bessent noted that 50% of China’s energy comes from the Gulf, implying leverage for Washington.
The conflict has already injured 757 U.S. military personnel and killed 18, with more than 50 soldiers added to the Pentagon’s casualty database on Wednesday. Iran’s Foreign Minister Abbas Araghchi dismissed the sanctions as a “diversion from America’s own crisis: unprecedented debt and surging interest costs.”
Vice President JD Vance told a conservative podcast that economic pressure is now the “most effective tool” against Iran, acknowledging a “delicate dance” as Tehran may retaliate with its own economic measures. Bessent declined to specify whether China would be directly targeted, saying some conversations are “best to have in private.” Chinese President Xi Jinping is scheduled to visit the White House on Sept. 24.
Oil prices rose to a three-week high on Thursday amid the U.S. threats, which aim to end the nearly six-month war that has disrupted shipping through the Strait of Hormuz. The U.S. and Iran have twice announced ceasefires to restore shipping, but both collapsed. Iran has also accused Trump of seeking to divert attention from domestic economic struggles .
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