If it was my son or daughter, I’d suggest they go volunteer for a cause or movement rather than a candidate. There are lots of groups that work for local issues. Just off the top of my head; in CA is the surfrider foundation. All over there’s Habitat for Humanity. When I was a teen I volunteered at the National Zoo. (in washington dc) Charities and social services groups are always looking for volunteers. Personally I think it would be a way more meaningful experience than working for some politician trying to get elected.