He is okay siding with the Republican party, which is extreme right wing. US politics has a right wing party (the Democrat) and an extreme right wing party (the Republicans). Both of them incorporate a version of (neo)liberalism; they differ mostly on their social policies.

Regardless of his political affiliations, the guy's fortune is built on family wealth from south African emerald mines, and he's a billionaire. It's about as far from the left as you can go, which places him in the extreme right.