(CNN) - Democrats held onto the governorship in Washington on Friday, bringing an end to the only outstanding election from this week's governors' races.
Republican candidate Rob McKenna conceded to Democratic candidate Jay Inslee in a video statement. Inslee, a former U.S. representative, will succeed two-term Democratic Gov. Christine Gregoire.
"Despite the extraordinary efforts of our volunteers, donors, staff and everyone who's been part of Team McKenna, it appears we will fall short of victory when the last ballots are counted. After 17 months of hard work, that is a very disappointing result," said McKenna.
Eleven states held governors' races Tuesday. Democrats were defending eights seats, Republicans three.
By Wednesday afternoon, CNN had projected winners in all but one of the elections - Washington - where mail-in ballots made up about 40% of the votes.
With the race in Washington now decided, Democrats hold 19 governorships; Republicans 30. Rhode Island's governor is an independent.
Republicans flipped North Carolina this year, expanding their national lead over Democrats at the statehouse level. The state hadn't elected a GOP governor since the 1980s.
CNN's Robert Yoon contributed to this report.