Trump is under pressure to do 'something'. He has only himself to blame. A year ago he said that he wants the U.S. to leave Syria. Soon thereafter a fake chemical incident happened and he was pulled back in. The same thing happened this time after he declared that he wants the U.S. troops to leave. Why wasn't he prepare for the follow up? Now his earlier blustering and tweets brought him into this unpleasant position. He will have to find an 'action' or deal that is big enough to claim that he did 'something', but small enough to not incite a deadly Russian or Syrian response. He will also have to act within the next 48 hours.