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1966 Oregon U.S. Senate Election
Oregon · 2 candidates
Hatfield +3.5 pts · won by 24,017 votes
Mark O. HatfieldRepublicanWINNER51.75%
354,391 votes
Robert B. DuncanDemocratic48.25%
330,374 votes
Popular-vote totals for U.S. Senate elections come from the MIT Election Data and Science Lab (1976–2024).