Rank-and-file members of the Teamsters union back former President Donald Trump over Vice President Kamala Harris by a nearly two-to-one margin, according to a new poll.

The International Brotherhood of Teamsters, which consists largely of truckers and UPS drivers, released internal polling of its membership on Wednesday, finding that 58% support Trump to 31% who back Harris.

“For the past year, the Teamsters Union has pledged to conduct the most inclusive, democratic, and transparent presidential endorsement process in the history of our 121-year-old organization — and today we are delivering on that promise to our members,” Teamsters President Sean O’Brien said in a press release.

“Our members are the union, and their voices and opinions must be at the forefront of everything the Teamsters do,” he added.

The news comes two days after O’Brien met with Harris at the union’s Washington, D.C., headquarters, and two months after O’Brien raised eyebrows in political circles by speaking at the Republican National Committee. Labor leaders have largely backed Harris’s candidacy, but an endorsement from the Teamsters, one of the largest unions in the country, would be a major political victory for Trump.

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He fared worse against President Joe Biden, who exited the presidential race this summer. An initial poll conducted before Biden dropped out found him leading Trump 44.3% to 36.3%.

But Democrats replaced Biden atop the Democratic ticket amid fears he would lose the White House and hurt congressional candidates down-ballot. The Washington Examiner has contacted both campaigns seeking comment.