it's not vietnam, there aren't 548 americans dying every week and we haven't had a james earl ray orhan sirhan yet to assassinate our leaders, but whether it's zika, istanbul, orlando, events are in the saddle and things are not going to get better and it's a dreary, political landscape right now. >> woodruff: this is a year where there has been, david, a loft anger in the political conversation. how do the events of the week play into that? >> it's a period of bad feeling. when bad filings happen, walls go up and things close. we're losing a lot of closeness, whether open trade, open people and conversations, some of that's closing, at least the impulses in a lot of society, including n.a.t.o. between eastern and western europe, a lot of walls going up and a lot of candidates proposing walls going up. so when people are in a period of bad mood, then they want to hunker down and protect, and that's the exact opposite from what we need now. let's be frank, it doesn't help that we have an american political debate with basically one all white party and that just means we fall along ver