My Ely friend did some sleuthing and discovered a USA Today article from December 13, 1995 which is about Congressional spouses. This is what it had to say about Jim Oberstar and his wife:
“Some wives’ careers are even more directly connected to their husbands’ political activities. Jean Kurth Oberstar is the president of the aviation consulting firm of Kurth & Co. Her husband, Rep. James Oberstar, D-Minn., is the former chairman and current ranking member of the House Aviation subcommittee.”