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1988 Illinois U.S. House District 21 Election
Illinois · 2 candidates
Costello +5.2 pts · won by 10,451 votes
Jerry F. CostelloDemocraticWINNER52.6%
105,836 votes
Robert H. GaffnerRepublican47.4%
95,385 votes
Popular-vote totals for U.S. Senate elections come from the MIT Election Data and Science Lab (1976–2024).