Representatives have to do both, represent the interest of their voters, but also legislate on all sort of national topics, from financial regulations to defenc

Representatives have to do both, represent the interest of their voters, but also legislate on all sort of national topics, from financial regulations to defence matters. So it is very reasonable for a member of congress to become a specialist on a topic that may be of critical importance to the country one day. I wish more would have done that in the 90s when the internet and personal computers started being a big thing.