Nobody knows where he comes from and nobody knows what he wants, but this slimeball is the leader of a group of Nightbreeds and he is the most dangerous of all them. They call him Trumpbiote, for obvious reason. He admires those who are viewed as being 'fierce' and 'powerful', and those are the types he goes for. Most of the members of his gang aren't evil except for maybe Andre (a plant-based Nightbreed). In fact as his bio here clearly states, he's the only truly malicious one of them all. He also has a Mountain King vibe to him. Mountain King of course being a nod to Dovregubben the troll king from the play Peer Gynt and the classic piece "In The Hall Of The Mountain King".
He is pretty much self-explanatory - it's pretty much a supernaturally enhanced Donald Trump costume that has symbiotic qualities and is a manifestation of the man himself, in particular the fictional version of him from Ghosts Can't Do It. Unlike most