DeNardis was active in Republican Party politics in the 1960s, serving as a delegate to the state Republican conventions beginning in 1966. In 1970, he became a member of the
Connecticut State Senate. He served in the Senate until 1979, when he resigned to become President of the Connecticut Conference of Independent Colleges. In 1980, he ran for the
United States House of Representatives from
3rd congressional district that
Democrat Rep.
Robert Giaimo had held for 22 years before retiring. Although the Democratic Party had a significant advantage in voter registration, the district supported
Ronald Reagan by 25,769 votes in the presidential election and DeNardis defeated then-State Senator
Joe Lieberman by 13,121 votes. In the
Ninety-seventh United States Congress, he was a leader of the “gypsy moths”, a grouping of moderate Republicans that opposed some of Reagan’s budget cuts. He ultimately supported some of the cuts, but retained a $16 million grant to renovate the
train station in New Haven. In 1982, he faced Democrat
Bruce Morrison, the Executive Director of the New Haven Legal Assistance Association. Morrison was a former classmate of
Bill Clinton at
Yale Law School. Although DeNardis touted his opposition to some of Reagan’s initiatives, the district had a 110,000 –55,000 registration advantage and Morrison prevailed in the election by 1,687 votes. In 1984, DeNardis sought to win back his seat in a strong Republican year. Despite Reagan’s margin of more than 20% in Connecticut and the Republican capture of both houses of the
Connecticut General Assembly, he again lost to Morrison. ==After Congress==