I don't think the Suez comparison is accurate as previously discussed above this post.
I also don't think Obama has a clue of what to do. We can discuss the absurd irony of his willingness to schwack someone without UN and/or a coalition's support.
This, if it happens, is a face-saving gesture on his part. He proclaimed his red line a year ago and until the latest mess complete with widespread photos appeared, he was satisfied to think he had spoken. Which is all he can really do well.
Now that the liberal press, world, and hand-wringers are in full cry to "do something!" he thinks he is John Wayne.
Well done to the British Parliament for saying "Hell no!" and keeping you out of it and cutting Barry off at the knees.
Pity our Legislature won't. Most likely it'll be ignored and then won't do anything about that slight, just as they didn't for Libya. War Powers Act be damned, never mind the Constitution.
There is no U.S. vital national interest at stake in Syria.
Just Barry's pride.