In each case, the president faced stark alternatives. He could try to catch the wave, Bismarck style, by lending his support to the youthful revolutionaries and trying to ride it in a direction advantageous to American interests. Or he could do nothing and let the forces of reaction prevail. In the case of Iran, he did nothing, and the thugs of the Islamic Republic ruthlessly crushed the demonstrations. This time around, in Egypt, it was worse. He did both-some days exhorting Egyptian President Hosni Mubarak to leave, other days drawing back and recommending an "orderly transition."

The result has been a foreign-policy debacle. The president has alienated everybody: not only Mubarak's cronies in the military, but also the youthful crowds in the streets of Cairo. Whoever ultimately wins, Obama loses. And the alienation doesn't end there. America's two closest friends in the region-Israel and Saudi Arabia-are both disgusted. The Saudis, who dread all manifestations of revolution, are appalled at Washington's failure to resolutely prop up Mubarak. The Israelis, meanwhile, are dismayed by the administration's apparent cluelessness.

Last week, while other commentators ran around Cairo's Tahrir Square, hyperventilating about what they saw as an Arab 1989, I flew to Tel Aviv for the annual Herzliya security conference. The consensus among the assembled experts on the Middle East? A colossal failure of American foreign policy.

This failure was not the result of bad luck. It was the predictable consequence of the Obama administration's lack of any kind of coherent grand strategy, a deficit about which more than a few veterans of U.S. foreign policy making have long worried. The president himself is not wholly to blame. Although cosmopolitan by both birth and upbringing, Obama was an unusually parochial politician prior to his election, judging by his scant public pronouncements on foreign-policy issues.