Actually, according to the COTUS, there is a quite definitive answer. The COTUS spells out the minimum qualifications, and the voters (AKA the people) decide who is "advanced" enough to represent them. No one will satisfy everyone, and that is the beauty of our system, every few years all who meet the qualifications set forth in the COTUS can "throw their hat in the ring" and run for office. Then the people decide who will represent them. One time it may be a career politician, and the next it could be the plumber who fixed your toilet last week.