It was opposed by most Northern and Southern senators , as well as the National Association of Real Estate Boards .
Senator Walter Mondale , who advocated for the bill , noted that over successive years , it was the most filibustered legislation in U.S. history .
U.S. was opposed by most Northern and Southern senators , as well as the National Association of Real Estate Boards .
Senator Walter Mondale , who advocated for the bill , noted that over successive years , it was the most filibustered legislation in U.S. history .