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1978 Washington U.S. House District 4 Election
Washington · 2 candidates
McCormack +22.3 pts · won by 31,213 votes
Mike McCormackDemocraticWINNER61.15%
85,602 votes
Susan RoylanceRepublican38.85%
54,389 votes
Popular-vote totals for U.S. Senate elections come from the MIT Election Data and Science Lab (1976–2024).