Voting rights advocates celebrated a "huge win for democracy" Tuesday after New Yorkers approved a ballot measure that would establish ranked-choice voting in the nation's most populous city.

"It's been too easy for candidates to ignore marginalized communities, including LGBTQ voters, because they didn't think they needed every vote to win. Ranked-choice voting ends that mindset."

—Rod Townsend, Stonewall Democratic Club of NYC

With 90% reporting as of Wednesday morning, New York City's Ballot Question 1 won approval from 73.5% of voters.

NYC's ranked-choice voting (RCV) measure was supported by a number of advocacy groups, politicians, and even The New York Times editorial board, which called the question the "most exciting proposal" of the five measures considered by city voters Tuesday.

In an RCV system—also known as an instant runoff voting system—voters rank candidates for each office in order of preference on their ballots. If no candidate secures a majority of first-choice votes, an elimination process is triggered and continues until one candidate has majority support.

RCV has been growing in popularity across the United States in recent years. It is used in local and party election in some places around the country and statewide in Maine.

HUGE win for RCV in NYC.

The momentum continues.

This whole ranked-choice voting thing is really catching on. pic.twitter.com/CSrmqsw2tL — Lee Drutman (@leedrutman) November 6, 2019

In addition to establishing RCV in primary and special elections for all local offices beginning in 2021, the ballot measure will "increase the time between a city office vacancy and the special election to fill it from 45 days (60 for mayor) to 80 days" and "change the timeline for city council redistricting to complete it prior to city council nominating petition signature collection."

Celebrating the ballot measure's passage on Tuesday night, Common Cause NY executive director Susan Lerner said that RCV "is the simple solution that puts power back in the hands of the people where it belongs. We look forward to working with our diverse partners and elected officials to educate New Yorkers on how this important reform will work in the local 2021 elections and beyond."

The RCV provision garnered support from New Yorkers and national advocates alike. Backers included Rep. Alexandria Ocasio-Cortez (D-N.Y.)—a widely popular freshman congresswoman who represents parts of the Bronx and Queens—2020 Democratic presidential primary candidate and city resident Andrew Yang, Rep. Nydia Velasquez (D-N.Y.), state Attorney General Letitia James, Democratic state Sen. Julia Salazar, NYC Public Advocate Jumaane Williams, and actor, activist, and city resident Cynthia Nixon.

Thanks for voting #Yeson1, @CynthiaNixon! #RankedChoiceVoting reforms NYC’s outdated election system and forces politicians to pay attention to every community. Vote #YesOn1 before 9 pm TODAY to bring RCV to NYC. Find your poll site: https://t.co/UM2LKAPmg7 pic.twitter.com/9l7Fr5mHQD — Rank The Vote NYC (@RankTheVoteNYC) November 6, 2019

The advocacy group FairVote, which fights for fair elections and supports RCV, declared on Twitter: "This is huge for the #RankedChoiceVoting movement!"

This is huge for the #RankedChoiceVoting movement! "New York City has become the latest — and most populous — city to adopt ranked-choice voting, a major milestone for voting reform efforts." https://t.co/Q7iE8pj32R — FairVote (@fairvote) November 6, 2019

Supporters of an RCV system argue that it pushes candidates to focus on engaging voters rather than negative campaigning. FairVote president Rob Richie told Politico, "You've got to be, I think, a better candidate."

"You as a candidate have a lot more reasons to have conversations and engagements with people," he said. "The candidates that run traditional campaigns that involve using money and not using people have not done as well."

Rod Townsend, president of the Stonewall Democratic Club of NYC, said in statement ahead of the vote Tuesday that "it's been too easy for candidates to ignore marginalized communities, including LGBTQ voters, because they didn't think they needed every vote to win. Ranked-choice voting ends that mindset because with RCV, every vote matters."

"With ranked-choice voting, marginalized communities will be engaged by every candidate," Townsend added. "Candidates will have to knock on the door of not just a certain plurality, but on the diverse doors of NYC's mosaic majority."