deterrence. he didn't answer questions to what he fully meant. putin says this all the time, but for donald trump to put it out there was surprising, and it does seem to be a casual approach. some people are suggesting that it's because he met with nuclear and defense contractors yesterday, including lockheed martin that are trying to justify the f-35 fighter jet because it could carry a nuclear armed cruise missile system. we don't know. that would be interesting to see. the heritage foundation which has influenced some of the foreign policy debate has written about expanding nuclear weapons. so there is a lot of stuff out there. whom he's listening to and whether or not it's part of the confusion of some of the things he's said about arming south korea and arming japan with nuclear weapons around the campaign remains to be seen. >> thank you both. let me bring in sara fagan, a former aide to george w. bush. kareem john pierre.