god forbid there's a genocide. not without congressional approval. democrats and republicans both in the congress haven't challenged presidents and let them get away with running the military without the congressional approval. we learned the lesson in the vietnam war. >> the day the taliban claimed responsibility for killing two american service members in afghanistan. leaders have both said they want to end u.s. involvement in afghanistan. but it isn't over for america. why isn't it over? why can't presidents of different parties get us out of there. how could you? >> i appreciate the question. i have been in congress 17 years. and 12 of those years i have sat on the armed services committee. defense and appropriation. the lesson i have learned over the years is that you have to stay engaged in the situations.