I have come to the conclusion that Biden is a full blown sociopath. They are common enough. Obama cares about what people think of him, because he is a narcissist. Biden doesn’t. He just doesn’t give a shit, and if for some reason he ever became President he might well cause a massive catastrophe through a combination of his personality and lack of intelligence.
Think the Martin Sheen as the presidential candidate in Stephen King’s “The Dead Zone“. It’s that bad.