Vice President Kamala Harris is the first Democrat in more than two decades to fail to secure the Teamsters Party’s endorsement for president, as the union has rejected both Harris and former President Donald Trump.

The Teamsters, representing more than 1.3 million workers, had consistent supported Democratic presidential candidates for more than 20 year. In a statement released Wednesday, the union said it will not endorse any presidential candidate in the 2024 election, marking the first time since 1996 that it has chosen not to endorse any candidate.

All other major unions have supported Harris’ campaign.

After 1996, the Teamsters supported Democratic candidates Al Gore, John Kerry, former President Barack Obama, Hillary Clinton and President Joe Biden.

Decades earlier, the union supported the campaigns of former Republican presidents Richard Nixon, Ronald Reagan and George H.W. Bush.

“Unfortunately, neither major candidate was able to make any serious commitments to our union to ensure that the interests of working people always come before the interests of big business,” Teamsters President Sean O’Brien said Wednesday.

O’Brien added that the union wanted both Harris and Trump to commit to not interfering with “critical union campaigns or core Teamsters industries” and to respect members’ right to strike. Neither candidate made that commitment, he said.

The union continued to encourage all members to “vote in the upcoming elections and remain involved in the political process,” despite the union’s lack of support.

Newsweek reached out to Harris’ campaign for comment by email Wednesday afternoon.

Trump’s campaign quickly showed that a majority of Teamsters members favor supporting the former president, the union’s poll released Wednesday.

In an email, the campaign acknowledged that the union would not make a formal statement of support. According to Teamsters polls conducted from July 14 to Sept. 15, 59.6 percent of members supported Trump, while 34 percent supported Harris.

Other data from April 9 to July 3 showed Biden ahead of Trump, 44 percent to 36 percent. The poll did not provide information on the scope or methodology of the survey.

“President Trump is fighting for the working men and women of America. President Trump’s agenda will cut taxes and reverse the inflation that hurts working families the most,” the campaign said.

In an interview with Fox News on Wednesday afternoon, Trump said, “The Teamsters carry a lot of weight. The Democrats can’t believe it… it was always automatic that Democrats got the Teamsters, and they said we wouldn’t support the Democrats this year, so that was an honor for me.”

Harris and Trump have been actively engaging with the Teamsters, emphasizing the important role of unions in the 2024 elections. Union endorsements can influence the voting preferences of millions of members in several key and swing states.

On Monday, Harris visited the union headquarters, while Trump and Biden participated in roundtable discussions with Teamsters leaders. Biden called himself the “most pro-union president.”

In July, O’Brien made a rare appearance at the Republican Party Convention.

Update 9/18/24, 5:20 p.m. ET: This article has been updated with additional information and context.

Update 9/18/24, 4:15 p.m. ET: This article has been updated with additional information and context.