Unionized New York Times staffers are speaking out against a potential partnership between The Athletic and Kalshi.

The NewsGuild of New York—the labor union that represents more than 2,000 Times workers across three different units—sent a letter Wednesday to Times owner and publisher A.G. Sulzberger, Athletic publisher David Perpich, and senior editors at The Athletic and its parent company demanding that the prospective sponsorship agreement not go through.

The letter was unanimously approved by the Times Guild Unit Council and The Athletic’s contract action team.

“We don’t comment on rumored deals,” a Kalshi spokesperson tells Front Office Sports.

“Millions of people use prediction markets like Kalshi to view the forecasts on what’s happening in the world. They’re a great complement to news sites like The Athletic and The New York Times,” the spokesperson added.