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 County results Tower: 50–60% 60–70% 70–80% Carr: 50–60% 60–70% 70–80% 80–90% >90% Tie 40–50% | |||||||||||||||||
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| Elections in Texas |
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 Government |
The 1966 United States Senate election in Texas was held on November 8, 1966. Incumbent Republican U.S. Senator John Tower was re-elected to a second term in office over Democratic Attorney General of Texas Waggoner Carr. Tower became the first Republican ever reelected to the Senate from Texas or any former Confederate state.