He's definitely not anti-business regulation, and he's the rest of the things because that's what keeps his base, which in turn feeds his demented ego.
Remember, he was a registered Democrat until 2012 and invited the Clintons to one of his weddings.
All he cares about is feeding the monkey. For some people, that means drugs; for him, it's an ego thing.
He is their emperor, but not because he's a Republican. Indeed, the emperor thing is exactly what he wants.