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Brittany Louise Pettersen (born December 6, 1981) is an American politician serving as the U.S. representative from Colorado's 7th congressional district since 2023. She previously served as a member of the Colorado Senate from the 22nd district, and in the Colorado House of Representatives, representing the 28th district. She is a member of the Democratic Party.
| Year | Office | Party | Primary | General | Result | Swing | Ref. | ||||||
| Total | % | P. | Total | % | P. | ||||||||
| 2012 | State House | Democratic | 2,985 | 100.0% | 1st | 19,603 | 52.71% | 1st | Won | Hold | |||
| 2014 | 3,042 | 100.0% | 1st | 16,356 | 54.98% | 1st | Won | Hold | |||||
| 2016 | 3,781 | 100.0% | 1st | 22,431 | 55.58% | 1st | Won | Hold | |||||
| 2018 | State Senate | 16,066 | 100.0% | 1st | 42,747 | 58.16% | 1st | Won | Hold | ||||
| 2022 | House | 71,497 | 100.0% | 1st | 204,984 | 56.38% | 1st | Won | Hold | ||||
| 2024 | 71,052 | 100.0% | 1st | 235,688 | 55.33% | 1st | Won | Hold | |||||
| Source: Secretary of State of Colorado | Election Results | |||||||||||||
| House of Representatives | ||
| Preceded byEd Perlmutter | Member of the U.S. House of Representativesfrom Colorado's 7th congressional district 2023–present | Incumbent |
| order of precedence (ceremonial) | ||
| Preceded byAndy Ogles | United States representatives by seniority 349th | Succeeded byDelia Ramirez |