The International Brotherhood of Teamsters declined to endorse a candidate for president Wednesday, although both parties sought the support of the nation’s largest union.

The group’s General Executive Board voted Wednesday to abstain from an endorsement, citing a split among members and a lack of firm commitments from either major party candidate, Vice President Kamala Harris and former President Donald Trump, on labor issues.

The refusal to endorse can be viewed as a loss for Harris, the Democrat. The union has endorsed the Democrat in every presidential election since 2000, including Trump’s opponents, Joe Biden in 2020 and Hillary Clinton in 2016.

Each campaign sought the endorsement of the 1.3-million-member union, hoping it would buoy their candidate in Pennsylvania, Michigan and Wisconsin — the closely contested industrial states considered crucial to an Electoral College victory in November.

And the union’s leaders held in-person meetings with each candidate, seeking to extract policy commitments. But those commitments were not forthcoming, according to a statement from the union explaining the decision not to endorse.

“Unfortunately, neither major candidate was able to make serious commitments to our union to ensure the interests of working people are always put before Big Business,”? Teamsters General President Sean M. O’Brien said in the statement.

“We sought commitments from both Trump and Harris not to interfere in critical union campaigns or core Teamsters industries — and to honor our members’ right to strike — but were unable to secure those pledges.”

O’Brien encouraged the union’s politically diverse membership to remain active during the election season.

“Democrats, Republicans, and Independents proudly call our union home, and we have a duty to represent and respect every one of them,” O’Brien added. “We strongly encourage all our members to vote in the upcoming election, and to remain engaged in the political process. But this year, no candidate for President has earned the endorsement of the Teamsters’ International Union.”

Trump preferred in member poll

In an electronic poll the union released Wednesday, rank-and-file Teamsters preferred Trump, the Republican, over Harris 59.6% to 34%.

In a statement, the Trump campaign touted the poll results.

“While the Executive Board of the Teamsters is making no formal endorsement, the vast majority of rank-and-file working men and women in this important organization want President Donald Trump back in the White House,” the unsigned statement read.

The electronic poll’s results were a reversal from a previous straw poll that showed members supported President Joe Biden to Trump 44.3% to 36.3%. Biden dropped out of the race and endorsed Harris in July.

The mere question of whom Teamsters would endorse marks a significant shift toward Republicans. Unions, including Teamsters, have historically backed Democrats.

Trump’s populist appeal appears to have upset that tradition.

O’Brien had a prime-time speaking role at the Republican National Convention in Milwaukee this summer, though he did not endorse Trump. It was the first appearance by a Teamsters president at a Republican National Convention in the group’s 121-year history.

Harris’ running mate, Minnesota Gov. Tim Walz, was a teachers union member before entering politics.

The Harris campaign did not immediately return a message seeking comment.