The extent of that miscalculation was laid bare in recent days, as Iran threatened to fire at commercial oil tankers transiting the Strait of Hormuz, the strategic choke point through which all ships must pass on their way out of the Persian Gulf. In response to the Iranian threats, commercial shipping has come to a standstill in the Gulf, oil prices have spiked, and the Trump administration has scrambled to find ways to tamp down an economic crisis that has triggered higher gasoline prices for Americans.