If the legal challenge failed, more than 800,000 green card holders would have been allowed to vote in local elections, such as mayoral races.

New York’s top court has struck down a law that would have let noncitizens vote in New York City elections, with the court’s progressive majority overwhelmingly siding with Republicans who challenged the idea.

New York state’s top court put an end Thursday to New York City’s effort to empower noncitizens to vote in municipal elections.