Jeez, hear the man out!
I was watching one Congressman (Hunter, I think) sitting there looking on to the General answering his question, eyes glazed, half asleep. I'd say he didn't care what the answer was. Either his mind was already made up or he needed a nap badly. Knowing how sleep-deprived people are these days, the latter may well be true; however, that doesn't preclude the former also being true.
I get tired of people locking themselves into their positions and mindsets so much that they can't listen to other voices. It doesn't mean that they have to change their positions, but they do need to keep an open mind.