As we go to press, Bashar al-Assad seems to be losing Damascus, as he has lost much of the rest of the country. Reports last week suggested the Syrian president might already be in Latakia, the de facto capital of the Alawite heartland on the Mediterranean coast. But even if he has not already decamped, he will likely find his way there before long. The Assad regime is fighting with its back to the wall. It is a critical moment for Syria. And it is a critical moment for the Obama administration. Having watched the bloodshed in Syria from the sidelines for the last 16 months, it can still act to bring down the Assad regime before it kills thousands more.