In a win for Bernie Sanders, the AFL-CIO is delaying making it’s endorsement in the surprisingly close Democratic presidential primary.

The news of the decision came in an email from Richard Trumka, the president of the AFL-CIO, to the union’s executive council. It was first reported by The Huffington Post Wednesday. A vote had been expected next week at the union’s annual winter meeting in San Diego.

“Following recent discussion at the AFL-CIO’s Executive Committee meeting and subsequent conversations with many of you, I have concluded that there is broad consensus for the AFL-CIO to remain neutral in the presidential primaries for the time being and refrain from endorsing any candidate at this moment,” Trumka said in the email.

Former Secretary of State Hillary Clinton has broad union backing, with endorsements from most unions. The AFL-CIO holding out was considered a win for Sanders.