If he responds strongly to criticism by the mother and father of a fallen soldier, he isn't going to come out on top. When you're interviewing to become the most powerful leader on earth, there are some people with whom you just have to grit your teeth and be gracious.
I guess there are stories circulating now about the father's connection to the Islamic Brotherhood, who knows what will come out about that.
But to the vast, politically ignorant majority of Americans, Trump lost face, big time. Of course, most of them won't vote anyway...
Concur; Trump should not attack anyone but Clinton/Kaine for the duration of the campaign. Focus.