When the subject "a family business" comes up in polite conversation we ought not to overlook that concept in Congress. Representative John Dingell, D-Michigan, 80-years old, has been in Congress since 1955 when he succeeded his father (also John Dingell) who had served from 1933. Mr. Dingell will likely re-assume his old chairmanship of the House Energy and Commerce Committee (he was the chair from 1981-1994), in the next congress.
In related notes, Massachusetts (my birth state) holds a unique place in the House of Representatives. Among states with more than two Representatives only Massachusetts has a solid Democratic membership, 10 seats, and each incumbent was re-elected this week. (The state also has two Democratic Senators.) California has the most seats in the House, 53, with 34 Democrats and 19 Republicans; the Dems picked up one seat in the election. South Carolina has two Democrats and four Republicans, unchanged from the current term.