Ken Buck

Kenneth Robert Buck (born February 16, 1959) is an American lawyer and politician who represented Colorado's 4th congressional district in the United States House of Representatives from 2015 until his resignation in 2024. Buck served as chair of the Colorado Republican Party, from 2019 to 2021. Formerly the District Attorney for Weld County, Colorado, Buck ran unsuccessfully for U.S. Senate in 2010, losing to Democrat Michael Bennet. In Congress, Buck joined the Freedom Caucus, and emerged as a staunch fiscal conservative, as well as one of the foremost proponents of antitrust enforcement in the Republican Party. Buck announced in November 2023 that he would not seek a sixth House term, stating that his party's "insidious narratives breed widespread cynicism and erode Americans' confidence in the rule of law." On March 12, 2024, Buck announced he would resign from Congress at the end of the following week on March 22, 2024. Governor Jared Polis scheduled the special election for Buck's replacement for June 25.