Look at the last few months, he said: President Bush went to the Middle East in January, Secretary of State Condoleezza Rice went in February, Vice President Dick Cheney went in March, the secretary of state went again in April, and the president is there again this week. After all that, oil prices are as high as ever and peace prospects as low as ever. As Mr. Miller puts it, America right now “cannot defeat, co-opt or contain” any of the key players in the region.

The big debate between Barack Obama and Hillary Clinton is over whether or not we should talk to Iran. Obama is in favor; Clinton has been against. Alas, the right question for the next president isn’t whether we talk or don’t talk. It’s whether we have leverage or don’t have leverage.

When you have leverage, talk. When you don’t have leverage, get some  by creating economic, diplomatic or military incentives and pressures that the other side finds too tempting or frightening to ignore. That is where the Bush team has been so incompetent vis-à-vis Iran.

The only weaker party is the Sunni Arab world, which is either so drunk on oil it thinks it can buy its way out of any Iranian challenge or is so divided it can’t make a fist to protect its own interests  or both.

We’re not going to war with Iran, nor should we. But it is sad to see America and its Arab friends so weak they can’t prevent one of the last corners of decency, pluralism and openness in the Arab world from being snuffed out by Iran and Syria. The only thing that gives me succor is the knowledge that anyone who has ever tried to dominate Lebanon alone  Maronites, Palestinians, Syrians, Israelis  has triggered a backlash and failed.

“Lebanon is not a place anyone can control without a consensus, without bringing everybody in,” said the Lebanese columnist Michael Young. “Lebanon has been a graveyard for people with grand projects.” In the Middle East, he added, your enemies always seem to “find a way of joining together and suddenly making things very difficult for you.”