I don't know. I would stay away from politics as he will give your default answers. Ask him anything about politics and you can find the answer online somewhere.

I would ask him something worthwhile about how he handles difficult or stressful situations in life and how he deals with / copes with / approaches these things. Regardless of his position on any number of political or social issues, the man has had a successful career in an intense field. Working with others, getting what he wants, compromising, figuring out how to accomplish things, dealing with stress, negotiating - these are all skills that he could provide valuable insights on and may take the time to answer as it isn't snarky.

Who knows, you might learn something incredibly valuable that you can use later in your career or personal life.

Maybe I'm just optimistic or weird but I think that politicians deal a whole pile of shit that none of us even consider. As in, how do you act as the face of your country when visiting abroad, maintain personal friends as well as politically beneficial friends/enemies, maintain a healthy relationship with your spouse, have knowledge and real fears about your country and your personal safety and the safety of those around you, keep a calm head to listen and (sometimes) respectfully respond to the idiot across the table from you. I'd blow up and tell everyone to fuck off. He somehow gets what he wants some percentage of the time. That's interesting to me.