let's talk about the a new poll. it shows that over two-thirds of americans think that it is likely that it's likely that isis will reemerge in syria after the u.s. withdrawal. you have said that you think president trump is the biggest source of geo political instability in the world. does that make us less safe? obviously it does. >> there are many associated spin off crises with trump. the biggest crisis is if the world no longer can count on the country that as flawed as it is has been the only guarantee and leading super-power of the 30-year post cold war era. this is something that began before trump became president. but has been accelerated by president trump in a way that causes instability and risk in the world to go up. as far as isis goes, you have seen a really fascinating theme.