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San Francisco Supervisor Matt Haney declared himself the winner on Twitter on Tuesday evening in a bid for State Assembly.

With all precincts having reported as of Tuesday night, Haney had secured at least 63.3 percent of the votes in the race for Assembly District 17, with challenger David Campos garnering 36.7 percent. Not all of the votes are counted, but Haney’s commanding lead makes him the projected winner.

“First results are out: We’re up by over 27 points. We won,” tweeted Haney.

Approximately 23 percent of registered voters turned out for the special election that was held to replace David Chiu, who resigned after being named city attorney by Mayor London Breed. Breed will now select Haney’s replacement on the board of supervisors.

Assembly District 17 represents the eastern half of San Francisco, including the Mission District and Financial District as well as neighborhoods of North Beach, Visitacion Valley and Twin Peaks, among others.

“We ran a positive, inclusive campaign focused on the issues San Franciscans care about,” Haney tweeted Tuesday, “housing, homelessness, climate & economic justice. We built a powerful coalition–uniting working people, housing advocates, & people from every neighborhood & community in SF.”

His Twitter feed was filled with mostly congratulatory messages from campaign supporters and constituents, and it appeared he spent much of election night basking in the glow and responding to the affirmations.

He later posted a color-coded electoral map showing how he won most of the precincts — a fete he attributed to “listening to people, speaking to them directly about things they care about, and hard work.”

“We made nearly 180,000 calls and knocked on over 85,000 doors. So proud of our incredible field team, volunteers and supporters led by (Han Zou),” Haney tweeted.