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County results Thune: 50–60% 60–70% 70–80% Daschle: 50–60% 60–70% 70–80% 80–90% | |||||||||||||||||
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Elections in South Dakota |
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The 2004 United States Senate election in South Dakota was held on November 2, 2004. Incumbent Democratic U.S. Senator and Senate Minority Leader Tom Daschle ran for re-election to a fourth term, but was narrowly defeated by Republican John Thune.
Daschle was the only incumbent U.S. Senator to lose re-election in the 2004 election cycle. His defeat also marked the only time a Senate party leader lost re-election since 1952 when Barry Goldwater defeated Ernest McFarland in Arizona.