Nobody can tell it better than Rachel Maddow:
https://www.alternet.org/news-amp-politics/rachel-maddow-reveals-sickening-reason-trump-hasnt-talked-about-us-soldiers-killed
https://www.alternet.org/news-amp-politics/rachel-maddow-reveals-sickening-reason-trump-hasnt-talked-about-us-soldiers-killed