United States Senate election in Hawaii 1976 Tags: Election.The 1976 United States Senate election in Hawaii took place on November 2 1976. Incumbent Republican U.S. Senator Hiram Fong decided to retire instead of seeking re-election to a fourth term. Democrat Spark Matsunaga won the open seat. thumbnail start date 1976-11-02 title United States Senate election in Hawaii 1976 Learn more... Loading...