This exchange occurred during Robert Bork's nomination to the Supreme Court under Reagan.
" In the course of any given year, Congress votes on taxes, medical care, military spending, foreign aid, agriculture, labor, international trade, airlines, housing, insurance, courts, natural resources, and much more. There are professionals who have spent their entire adult lives specializing in just one of these fields. They idea that Congress [or the American voter] can be competent in all these areas simultaneously is staggering." - Sowell