(CNN) – The only undecided gubernatorial race is in the state of Washington where the contest appears to remain close with just over half of the votes counted Thursday.
Democrat and former Rep. Jay Inslee hopes to bar Republican Attorney General Rob McKenna from breaking the state's over 30 year streak of electing a Democrat to the office.
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With 55% reporting, Inslee had 51% support of Washington voters while McKenna had 49%.
All of Washington's elections are conducted by mail and ballots are expected to take several days to be counted.
After an easy primary battle for both candidates, Inslee, a former eight-term congressman, and McKenna hope to grab the vacant governor's office to replace the two-term Democratic Gov. Chris Gregoire, who announced she would not seek a third term.
Going into the elections, Democrats held 20 governorships and were defending eights seats while the Republicans held 29 and were defending three. Rhode Island is held by an independent.
Eleven states held governors' races on Tuesday and Republicans expanded their gubernatorial map picking up North Carolina.
CNN's Dana Ford contributed to this report.