He already has the world at his fingertips. He'd actually lose power. There's a reason why guys like Gates, Zuckerberg, Ellison, etc. have not gone into politics.
Trump being a failed businessman is the exact reason why he's in politics. He's dirty as shyt, super connected to very shady people, and doesn't have any principles. It's natural for him in a way that's not for actual successful CEOs.
But think about, Trump has been able to buck every "norm"
He essentially still runs his branding business.
Countries all over the globe pay upsell to stay at a Trump branded facility.
Imagine Bezos with no regard for law like Trump but far smarter/wealthier/powerful right off of the bat.
No law or "constitution" would effectively stop him