US threat of ‘economic D-Day’ for Iran tests Trump’s China detente

US President Donald Trump’s administration has said it aims to sever “every” economic lifeline sustaining Iran in what officials have warned will be the toughest sanctions campaign ever seen.

The threat, if followed through, would mean putting China, Iran’s biggest trade partner, squarely in the crosshairs of US sanctions.

That would be a risky proposition for Washington due to the likelihood of severe blowback from Beijing – so much so that some analysts doubt that the Trump administration’s measures, set to be announced on Monday, will match its rhetoric in scope or severity.

While the Trump administration has yet to provide details about what it has dubbed “economic D-Day”, US officials have made it clear that Iran’s trade partners are in their sights.

In an op-ed in the Financial Times on Sunday, US Treasury Secretary Scott Bessent warned that countries fearful of breaking ties with Iran should not “discount the cost of testing Washington”.

“The president has created the conditions to leverage every agency, every authority and action many assumed we would never summon,” said Bessent, who is scheduled to unveil the sanctions in a news conference at 17:00 GMT.

Brett Erickson, a sanctions expert and managing principal of Obsidian Risk Advisors, said the Trump administration’s willingness to target China will be an indication of its resolve to mount a sustained economic offensive against Tehran.

“That is not a relationship you degrade lightly. If the United States decides to really bring China into the ring, it will be a serious indication that the United States plans to wage this economic war for a prolonged period of time,” Erickson told Al Jazeera.