The State Department official, Frederic Hof, told Congress on Wednesday that Assad’s repression may allow him to hang on to power but only for a short time. And, he urged the Syrian opposition to prepare for the day when it takes control of the state in order to prevent chaos and sectarian conflict.

“Our view is that this regime is the equivalent of dead man walking,” said Hof, the State Department’s pointman on Syria, which he said was turning into “Pyongyang in the Levant,” a reference to the North Korean capital. He said it was difficult to determine how much time Assad has left in power but stressed “I do not see this regime surviving.”