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33 of the 100 seats in the United States Senate 51 seats needed for a majority | ||||||||||||||||||||||||||||||||||||||||
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![]() Results of the elections: Democratic gain Republican gain Democratic hold Republican hold No election | ||||||||||||||||||||||||||||||||||||||||
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The 1984 United States Senate elections were held on November 6, with the 33 seats of Class 2 contested in regular elections. They coincided with the landslide re-election of President Ronald Reagan in the presidential election. In spite of the lopsided presidential race, Reagan's Republican Party suffered a net loss of two Senate seats to the Democrats, although it retained control of the Senate with a reduced 53–47 majority. Democrats defeated incumbents in Illinois and Iowa, and won an open seat in Tennessee, while Republicans defeated an incumbent in Kentucky.