TEHRAN, Aug. 22 -- For the family of the textile merchant in the Isfahan bazaar, the math of the war has arrived in the form of new geography. A cotton shipment that used to clear the port of Shahid Rajaee in two weeks now travels by truck through the Turkish border crossing at Kapikoy, taking eleven days and costing more. But it arrives.

Three months after Washington declared what Treasury Secretary Scott Bessent called "the greatest coordinated economic isolation in the history of the world," Iran is not isolated. It is rerouted.

The United States has imposed round after round of US economic sanctions targeting Iran's financial networks, energy exports, and foreign exchange houses since the conflict began in late February. But Iran ha...