this you can't address the problem of isis without getting rid of assad. we're led to believe that iran would be a sort of integral partner in foe meanting what you might call regime decapitation or transition. russia would have to work to see that forward too. what's happening in syria is interesting. the regime is losing losing badly and so is iran by the way, in northern syria, islib provis has fallen out of the regime's control, southern syria and the regime and guard corps of iran have been badly defeated. the u.s. sees this as an opportunity. aepts skeptical a nuclear deal with iran or any kind of friendly overtures with the kremlin will bring about this sort of grand ambition. but remember as you pointed out, wolf last time kerry went to moscow was for what to sue for peace in syria get russia to stop selling s-300 anti-aircraft missiles to assad and the event of that was the announcement of the geneva 2 peace protocol