U.S. Vice President JD Vance said economic pressure is the United States' most effective tool against Iran, describing the strategy as a delicate dance because both sides are applying pressure. He said Iran had felt much more pressure than the United States over the last couple of weeks. His remarks followed U.S. President Donald Trump's pledge to launch the "most crushing economic operation ever taken against any country" against Iran and impose severe financial penalties on countries helping Tehran evade sanctions. Trump called the campaign "Economic Warfare and Isolation on an unprecedented scale." Vance said pump prices for Americans remain elevated but have fallen substantially because U.S. forces helped move significant oil and gas through the Strait of Hormuz, Iran's main source of leverage. Kpler data showed only 10 ship crossings on Monday and two on Sunday, compared with about 130 daily transits before the war. Vance said Iran was being punished for firing on commercial ships and that the U.S. would ensure Iranian forces could no longer do so, claiming the effort had been quite successful.