I do not do a lot of posting here about current political issues, but for this one I want to get my views on record before they become obsolete, either because my prediction is right or because it is wrong.
Assad's offer to turn over his chemical weapons to international authorities and have them destroyed provides Obama the best opportunity he is likely to get to escape the political trap he has created for himself. If he has any sense he will agree—whether or not he believes Assad will actually do it. The only reason I can think of to expect him not to is the argument that, if he had any sense, he would not have gotten into the trap. But one mistake is a weak basis for that strong a conclusion.