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 
yeah but I don't think he's gonna die from a broken rib or punctured lung when he's got the best medics in the world airlifting him to hospital in a matter of minutes
whereas a brain shot is one and done
you can see the appeal
anyway lesson learnt rock up with the .50 BMG next time