Believe me, I'm with you - I don't want it to be true. I take absolutely no pleasure in the fuck-ups of a mentally challenged narcissist. But given his long established speech patterns, I would absolutely believe that he would say something this utterly tone deaf.
Now - there is truth to that line. The soldier did know the risk. But you have two acceptable options: either praise the hell out of him "your husband bravely dedicated his life to his country, even with the knowledge that his service carried the risk of making the ultimate sacrifice", etc. Or, you could just not say anything along the lines of "he knew...." because it's way too easy to make it sound like it was his own fault for getting himself killed. So the second option - excluding that sentiment entirely - is far and away the better choice when speaking directly to a grieving widow, especially if you suck at words. Save it for memorial addresses.
But that's the problem with the guy in office right now. He doesn't get that - and he doesn't understand that he doesn't get that, so he's not trying to change.
edit: mother of the widow, also present in the car, backs up the story as published so far. Still he said/she said, but it's "people who don't really have a reason to lie" vs "guy who lies a dozen times a day".
https://www.washingtonpost.com/news/...=.a0a44f5686c9