Dow Constantine

Constantine announced his candidacy for King County Executive on February 16, 2009 to replace Ron Sims who was appointed the United States Deputy Secretary of Housing and Urban Development.[7] In the primary election, Constantine received 22% of the votes to advance to a run off against candidate Susan Hutchison, who received 37%.[8] Described as "perhaps the most contentious race on the November [2009] ballot" by Seattle NPR outlet KPLU,[9] the campaign has been characterized by negative campaigning, including "mudslinging" ads paid for by the candidates' supporters.[10][11][12]

Constantine received press attention for stressing the conservative affiliations of Hutchison, pointing to her involvement with the Discovery Institute and contributions to Republican candidates such as President Bush in 2004 and Mike Huckabee in 2008.[13][14][15] Hutchison downplayed any perceived partisanship and criticized Constantine as a political insider with close ties to labor unions.[4]

In October 2009, the Washington State Public Disclosure Commission (PDC) investigated allegations that the Constantine's campaign illegally coordinated with an independent campaign on anti-Hutchison ads.[16] The PDC concluded there was no coordination and dismissed the complaint.[17] The PDC also investigated complaints regarding Hutchison's campaign on allegations that campaign contributions exceeded single election limits and that expenditures by the campaign were not properly documented.[18] The PDC imposed a $100 fine against Hutchison for exceeding campaign limits and dismissed the failure-to-report allegations.[19]

Constantine acknowledges crowd applause after taking the oath of office as King County Executive.

Constantine was endorsed by Governor Christine Gregoire,[20] Seattle Mayor Greg Nickels, US Senators Patty Murray[21] and Maria Cantwell,[21] Washington State Senate Majority Leader Lisa Brown as well as state Senators Ed Murray, Ken Jacobsen, Joe McDermott, and Karen Keiser.[22] Organizations that endorsed Constantine included NARAL Pro-Choice Washington, the Sierra Club, the Cascade Bicycle Club, International Association of Machinists and Aerospace Workers and the UFCW.

On election night, November 3, the initial batch of election results had Constantine winning the election over Hutchison, at that time receiving 57% of the votes to her 43%.[23] He was expected to replace interim Executive Kurt Triplett on November 24 following the certification of election results by the King County Elections' Canvassing Board.[24] Constantine was ultimately declared the winner, and was inaugurated November 24, 2009.

In early 2019, Constantine was frequently mentioned as a possible candidate for Governor of Washington in the 2020 election. Two-term incumbent Jay Inslee was constitutionally eligible for to run for a third term but had opted to mount a campaign for President of the United States in the 2020 election instead, leaving the Governor's Office open.[25][26] Several Democrats expressed interest in running should it be an open election but did not want to challenge Inslee should he change his mind.[27] Facing poor polling numbers, Inslee decided to suspend his presidential campaign on August 21 and announced the next day he would indeed seek a third term as governor. Constantine, along with several other potential candidates, released a statement that he would not be running in 2020 and would instead focus on his own 2021 reelection campaign.[28]