If you hit Donald Trump with any sniper rifle calibre from 150 m distance ANYWHERE on his body, the man’s toast. He’s a 80 year old jellybean, held together by his personal BigMac/Adrenochrome mix.
But the dude likely played too much COD or CS and simply got convinced that Trump has too much HP and you need to go for the headshot. Motherfucking 
I should be honest that they’re technically bullet resistant and probably won’t stop anything stronger than a 9mm, but that’d still probably increase your chances of survival if it’s a long enough away shot (which it wasn’t lol)