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 County results Allott: 50–60% 60–70% 70–80% Romer: 50–60% 60–70% | |||||||||||||||||
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| Elections in Colorado |
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The 1966 United States Senate election in Colorado took place on November 8, 1966. Incumbent Republican Senator Gordon Allott was re-elected to a third term in office, defeating Democratic State Senator Roy Romer.
Romer would later be elected three terms as Treasurer of Colorado and another three terms as governor.