The US expanded sanctions pressure on Iran by targeting Turkey’s Golden Global Bank and its subsidiaries, which the Treasury Department says facilitated tens of millions of dollars in transactions, including Chinese oil revenues, for the Islamic Revolutionary Guard Corps-Quds Force. The measures followed Secretary of State Marco Rubio’s instruction to diplomats to urge host countries to systematically sever ties with Iran and immediately close branches of Iranian banks. The actions are part of Operation Economic Outcast, a campaign President Donald Trump had previewed as economic D-Day for Iran, but sanctions have been introduced incrementally over nearly two weeks rather than through a single sweeping action. Experts and diplomats remain skeptical that Washington will impose major measures on China, Pakistan or Oman, citing their economic or diplomatic ties with Iran. Treasury Secretary Scott Bessent says the campaign has received strong international support and is being conducted at unprecedented intensity, while analysts note that sanctions typically take time to affect an economy that has spent decades adapting to them.