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![]() County results Armstrong: 50–60% 60–70% 70–80% Haskell: 50–60% 60–70% 70–80% | |||||||||||||||||
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Elections in Colorado |
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The 1978 United States Senate election in Colorado took place on November 7, 1978. Incumbent Democratic Senator Floyd Haskell ran for re-election to a second term, but was soundly defeated by Republican U.S. Representative William L. Armstrong.