The slaughter of civilians in Aleppo last week may have shocked the conscience of the world, but no one should have been surprised. Syria's Assad regime has always treated opponents savagely, and its assault on Aleppo, once the country's largest city, has been coming for a long time.
When Secretary of State
"What has happened already in Aleppo is unconscionable," Kerry said. "The Assad regime is actually carrying out nothing short of a massacre."
"Are you truly incapable of shame?" Power asked the Syrians and their allies. "Is there no act of barbarism against civilians, no execution of a child that gets under your skin?"
But their anguish was real — in part because both Kerry and Power have long urged
The U.S. inability to stave off the fall of Aleppo was the tragic but predictable product of a mismatch between Obama's rhetoric and his commitments.
Soon after the uprising against Assad began in 2011, Obama declared the United States on the side of the rebels and announced that the dictator's days were numbered.
The president never backed up those words with action, though, because he believed there was no compelling U.S. interest that justified direct intervention in the
Assad and his allies in Russia and Iran decided, to the contrary, that there was a military solution — and, so far, they are turning out to be right.
The winners are the Assad regime, the Iranian Revolutionary Guard and Lebanese Hezbollah who supplied many of the ground troops, and Russia, which provided air power and special operations forces.
The city was the last major stronghold of the moderate rebels whom the United States had been supporting. Their defeat sends many of their surviving fighters into territory controlled by the more radical Conquest Front, Al Qaeda's affiliate in Syria.
The battle in Aleppo also took Syrian troops away from the eastern front where they've been sporadically fighting Islamic State, allowing that group to reconquer Palmyra.
So the fall of Aleppo is not only a humanitarian disaster; it's a setback for hard-nosed U.S. interests, too.
In Obama's defense, it's true that there were never easy, cost-free alternatives to his policy of restraint. But it's not true, as he also argued, that the only alternative was a full-scale U.S. invasion.
Obama aides spent years proposing less-costly alternatives, only to be turned down.
In 2012, then-Secretary of State Hillary Clinton and Defense Secretary
In 2013, after Assad used chemical weapons against civilians, Obama announced that he would retaliate with U.S. military force — but had second thoughts.
In 2014, after Assad began dropping crude barrel bombs into rebel-held neighborhoods, aides proposed supplying anti-aircraft weapons to the insurgents, but they were denied.
Instead, in a half-measure, the United States sent anti-tank missiles, which helped the rebels win a series of victories on the ground and brought the war to an apparent stalemate in 2015.
At that point, though, Russia's Vladimir Putin intervened, surprising the White House by sending air force units to back up Assad's troops.
"The Russian intervention shut the door on U.S. action to protect civilians," said Frederic C. Hof of the Atlantic Council, a former State Department expert on Syria. "The administration worried that any military action would risk a conflict with Russia."
Meanwhile, Kerry doggedly negotiated a series of ceasefire agreements, none of which took hold. Although the Russians played along, they never restrained the Syrian military or its Iranian and Lebanese allies on the ground.
The Obama administration didn't start the Syrian rebellion and doesn't bear sole responsibility for the disasters that followed. The Assad regime and its allies, after all, are the ones who battered Aleppo with pitiless force.
But officials acknowledge privately that Syria has been the greatest foreign policy failure of their eight years in office.
With only a month remaining in Obama's term, there's little more for them to do but continue pleading for an orderly evacuation of Aleppo — and to prepare their briefings for President-elect Trump.
Trump has suggested he might try to end the Syrian war by allying with Russia and leaving Assad in place. His national security advisor, Michael T. Flynn, has said he also wants to reduce Iran's influence.
"Good luck," said Hof. "We're still coming at this from the sidelines, without much leverage to get what we want. That's been the problem all along."