Washington's 8th congressional district

In 2004, Dave Reichert, at the time serving as the sheriff of King County, beat his Democratic opponent Dave Ross by 52% to 48% in the race to replace 12-year incumbent Jennifer Dunn; that year, voters in the district favored Democratic presidential candidate John Kerry.

Responding to Reichert's perceived vulnerability, former Microsoft program manager Darcy Burner (D) challenged Rep. Reichert in 2006, in what was widely expected to be a close election. Influential election analyst Charlie Cook listed the contest among 68 competitive or potentially competitive House races to watch in 2006, categorizing it as a "toss-up" (defined as "the most competitive; Either party has a good chance of winning").[5] Burner was one of 22 House challengers selected by the Democratic Congressional Campaign Committee (DCCC) for fundraising assistance with its "Red to Blue" program, aimed at unseating vulnerable Republican incumbents around the country.[6]

In the end, Reichert won re-election, defeating Burner by just 7,341 votes out of more than 250,000 cast.[7] The outcome of the race was not decided for almost a week after the election, as severe flooding in the eastern part of the district delayed the counting of absentee ballots.[8]

In the 2008 election, Reichert faced Burner again in a rematch that many election watchers again described as one of the nation's hottest contests. This time, Reichert defeated Burner 53 percent to 47 percent, a solid victory despite Barack Obama's 15-point margin in the district.

In the 2010 election, Reichert and Democrat Suzan DelBene advanced out of the Washington State Top 2 Primaries with 47.2% and 26.9% of the vote, respectively. Reichert prevailed over DelBene in the General Election 52.1% to 47.9%. In this election, Reichert won both King and Pierce counties even after losing some key endorsements, including the Seattle Times, which endorsed Suzan DelBene and Tim Dillon in the primaries.[9][10]

In the 2012 election, Reichert ran against Democrat Karen Porterfield, Associate Dean and Public Administration Lecturer at Seattle University. James Windle of Snoqualmie Pass also ran against Reichert as an independent candidate, but dropped out of the race in August 2012.[11]

In the 2014 election, Reichert defeated Democrat Jason Ritchie, a small business owner from Issaquah.

In the 2016 election, Reichert defeated Democrat Tony Ventrella, a former sportscaster. Ventrella did not think he would beat the other candidates in the field and dropped out in July 2016 only to finish second overall and restart his campaign in the general election.[12]

Reichert announced in September 2017 that he would not seek re-election.[13] Former State Senator and gubernatorial nominee Dino Rossi advanced from the top-two primary alongside pediatrician Kim Schrier.[14] In the general election, Schrier defeated Rossi with 52% of the vote to become the first Democrat to represent the district.[15]

Schrier defeated Republican Jesse Jensen with 52% of the vote, a similar percentage as in 2018.[16]