Microsoft founder Bill Gates weighed in on his fellow billionaire Elon Musk’s international political ambitions—twice calling the Tesla and SpaceX owner’s support for far-right movements abroad “insane.

The Microsoft cofounder reflects on Musk’s achievements while expressing curiosity about his political commentary in Europe.

Early in the days of Microsoft, I didn’t believe in having an office in Washington, D.C. I later learned that was a mistake,’ Gates says