Polls conducted by the union found that roughly 60 percent of members favored Trump, while about 34 percent backed Vice President Kamala Harris. This marks a significant shift for a union that has historically supported Democratic candidates, including backing Hillary Clinton in 2016 and Biden in 2020.

The Teamsters’ decision reflected a labor union divided over political identity and policy, despite its members having directly benefited from the Biden administration. It was Biden who, soon after taking office, signed into law a $1.9 trillion stimulus package that included $86 billion for multiemployer pension plans. Tens of billions of those dollars went to a pension fund owned by about 350,000 members of the Teamsters union.

While in office, Biden also became the first sitting president to walk a picket line when he joined striking UAW autoworkers in Michigan a year ago in a show of support. He nominated labor-friendly lawyers to the National Labor Relations Board and appointed Harris to run a task force promoting union organizing and collective bargaining.