‘Tremendous costs’: Can Trump stop other countries from trading with Iran?

US President Donald Trump has announced what he describes as the “most crushing economic operation” against Iran, as Washington ramps up pressure on Tehran and talks to end the war between the two countries continue to stall.In a post on Truth Social on Wednesday, Trump said Iran had “failed to take” the opportunity to make a deal, and would face “economic warfare and isolation on an unprecedented scale”.Recommended Stories list of 3 itemslist 1 of 3USS Lincoln woes highlight US Navy limits in prolonged Iran war: Expertslist 2 of 3Trump threatens ‘tremendous’ costs for countries trading with Iranlist 3 of 3Publisher of US military newspaper resigns over differences with governmentend of listHe also threatened sanctions against any country that does business with Iran.“ANY country that allows its financial institutions, businesses, airports, or government entities to provide any type of lifeline to Iran will itself face TREMENDOUS Economic Consequences,” he wrote. “Oil smuggling, swap lines, cash transfers, exchange houses, ship registries, front companies – it all needs to stop NOW. You know who you are. This will be an ECONOMIC D-DAY, and we need all of our Allies to stand with th...