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Preserve Marriage Washington conceded Thursday that voters appear to have endorsed same-sex marriage in Tuesday's election.

Votes to approve Referendum 74 led 52 percent to 48 percent as of Wednesday night. Updated election results

The concession by the anti-R-74 group does not mean that the issue is decided. All the votes must still be counted.

We are disappointed in losing a tough election battle on marriage by a narrow margin, said Joseph Backholm, Chairman of Preserve Marriage Washington. But while we are disappointed, we are not defeated. We are fighting for a cause that is true, and beautiful, and right-the sacred institution of marriage. It's a cause worth fighting for, and we will continue to educate citizens and policymakers on the timeless truth that real marriage is the union of one man and one woman.

Despite a huge spending advantage by those supporting the measure, opponents kept the race close.

Our opponents and some in the media will try to portray this election as a turning point, but it's not a turning point to win on your home turf. The election results reflect the political and funding advantages our opponents enjoyed in this very liberal and secular state, said Backholm.

If approved, Washington would join Maine and Maryland as the first three states where voters approved legalizing same-sex marriage.

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