War and Rumor of War

In case we haven't yet had our fill of Asian war, Iran has made a threat that can hardly be less than mortal.

A senior Iranian official on Tuesday delivered a sharp threat in response to economic sanctions being readied by the United States, saying his country would retaliate against any crackdown by blocking all oil shipments through the Strait of Hormuz, a vital artery for transporting about one-fifth of the world’s oil supply.

The declaration by Iran’s first vice president, Mohammad-Reza Rahimi, came as President Obama prepares to sign legislation that, if fully implemented, could substantially reduce Iran’s oil revenue in a bid to deter it from pursuing a nuclear weapons program.

Prior to the latest move, the administration had been laying the groundwork to attempt to cut off Iran from global energy markets without raising the price of gasoline or alienating some of Washington’s closest allies.

Apparently fearful of the expanded sanctions’ possible impact on the already-stressed economy of Iran, the world’s third-largest energy exporter, Mr. Rahimi said, “If they impose sanctions on Iran’s oil exports, then even one drop of oil cannot flow from the Strait of Hormuz,” according to Iran’s official news agency. Iran just began a 10-day naval exercise in the area.

In recent interviews, Obama administration officials have said that the United States has developed a plan to keep the strait open in the event of a crisis. In Hawaii, where President Obama is vacationing, a White House spokesman said there would be no comment on the Iranian threat to close the strait. That seemed in keeping with what administration officials say has been an effort to lower the level of angry exchanges, partly to avoid giving the Iranian government the satisfaction of a response and partly to avoid spooking financial markets.

I doubt that the US, or the rest of the world, would tolerate a blockade. Breaking it would quite likely take at least a massive air war.