Horror shows like the slaughter of innocents in Syria continue because the U. N, since its creation, has been handicapped by the very nature of its structure.  It will never agree on anything or take any effective action as long as the Super Powers have a veto.     So it's left to the guy with the biggest stick and the biggest military force, in this case,  the Donald, to do something about it if he's so inclined and can bring the fractured Republican caucus together.