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| Elections in Colorado |
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A general election was held in the U.S. state of Colorado on November 2, 2010. All of Colorado's executive officers were up for election as well as a United States Senate seat and all of Colorado's seven seats in the United States House of Representatives. Primary elections were held on August 10, 2010.
Incumbent Senator and Democratic nominee Michael Bennet defeated Republican nominee Ken Buck in the general election.
All seven Colorado seats in the United States House of Representatives were up for election in 2010.
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 County results Suthers: 50–60% 60–70% 70–80% 80–90% Garnett: 50–60% 60–70% 70–80% | |||||||||||||||||
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Despite being courted in 2008 and 2010 to run for the U.S. Senate, Incumbent Republican Attorney General John Suthers chose to run for re-election. Suthers defeated his Democratic opponent, Stan Garnett, by a 13-point margin[ citation needed ] – the largest margin of victory in a statewide race in Colorado in 2010. [1] As of 2025, this was the last time a Republican would win Colorado by double digits.
| Party | Candidate | Votes | % | |
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| Republican | John Suthers (incumbent) | 960,143 | 56.35% | |
| Democratic | Stan Garnett | 743,750 | 43.65% | |
| Total votes | 1,703,893 | 100.00% | ||
| Republican hold | ||||
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 County results Gessler: 40–50% 50–60% 60–70% 70–80% Buescher: 40–50% 50–60% 60–70% | |||||||||||||||||||||
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In 2009, Democrat Bernie Buescher was appointed by Governor Bill Ritter to serve as Colorado Secretary of State, succeeding Republican Mike Coffman. Buescher ran for a full term in 2010 but lost to Republican Scott Gessler by 5.7%. [2]
| Party | Candidate | Votes | % | |
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| Republican | Scott Gessler | 852,818 | 49.52% | |
| Democratic | Bill Ritter (incumbent) | 755,522 | 43.87% | |
| Constitution | Amanda Campbell | 113,756 | 6.61% | |
| Total votes | 1,722,096 | 100.00% | ||
| Republican gain from Democratic | ||||
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 County results Stapleton: 50–60% 60–70% 70–80% Kennedy: 50–60% 60–70% 70–80% | |||||||||||||||||
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Incumbent Democratic State Treasurer Cary Kennedy unsuccessfully ran for re-election, narrowly losing to her Republican opponent Walker Stapleton. [3] [4]
| Party | Candidate | Votes | % | |
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| Republican | Walker Stapleton | 866,934 | 50.70% | |
| Democratic | Cary Kennedy (incumbent) | 842,877 | 49.30% | |
| Total votes | 1,709,811 | 100.00% | ||
| Republican gain from Democratic | ||||
One-half of the seats of the Colorado Senate were up for election in 2010.
All of the seats in the Colorado House of Representatives were up for election in 2010.
Multiple judicial positions were up for election in 2010.
Seven measures were certified for the 2010 ballot.
Many elections for county offices were also held on November 2, 2010.
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