Trump announces harshest economic action against Iran, warns against aid

US President Donald Trump today announced what he called "the most crushing economic action ever taken against any country" targeting Iran, warning that any nation whose financial institutions, companies, airports, or government bodies provide "any kind of lifeline" to Tehran would face "severe economic consequences."

In his statement, Trump said: "No one has given the Islamic Republic of Iran a greater chance to make a deal than I have, and tragically for them, they failed to seize it," declaring that what lies ahead is an "economic war and isolation on an unprecedented scale."

Trump outlined what he described as the results of the confrontation so far: "Their freedom is gone, their air force destroyed, their military factories are in ruins, their currency is worthless, and their country is hanging by a thread."

List of prohibitions aimed at allies and intermediaries

Trump specified the activities he demanded be halted "now," including oil smuggling, swap lines, cash transfers, currency exchange companies, ship registry records, and front companies, adding a veiled warning: "You know who you are."

He described the move as an "Economic D-Day," invoking the Normandy landings of World War II, and called on "all our allies to stand with the United States to isolate and defeat the Iranian threat." Trump said these "historic measures will cripple their ability to export terrorism worldwide," concluding with his repeated phrase: "Iran will never have a nuclear weapon."

Context: Locked coffers and maritime blockade

The announcement comes after weeks of escalating economic pressure, with locked coffers and a US maritime blockade reducing Iran's seaborne oil exports from around 2 million barrels per day to just 200,000 barrels, costing Tehran an estimated $435 million daily. Iran remains the world's second most-sanctioned country, facing more than 6,000 sanctions targeting its financial, oil, petrochemical, aviation, and digital currency sectors.

The US Senate recently passed the "Lindsey Graham Act," granting Trump additional tools through secondary sanctions and tariffs on countries that continue to buy Iranian oil. The new announcement appears to build on this approach, raising the risk of higher global energy prices and potential friction with Beijing, which accounts for over 80% of Iran's seaborne oil exports.