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 County results Hatfield: 40–50% 50–60% 60–70% Lonsdale: 40–50% 50–60% | |||||||||||||||||
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| Elections in Oregon |
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The 1990 Oregon United States Senate election was held on November 6, 1990, to select the U.S. Senator from the state of Oregon. Republican candidate Mark Hatfield was re-elected to a fifth term, defeating Democratic businessman Harry Lonsdale.