The International Brotherhood of Teamsters labor union is increasingly supporting Republican candidates in the 2026 midterm elections, marking a notable shift away from the Democratic Party. Teamsters General President Sean O’Brien has donated $62,000 to nearly two dozen GOP congressional candidates and contributed an additional $5,000 to the National Republican Congressional Committee. This realignment follows the union's decision to withhold endorsement from Vice President Kamala Harris in the 2024 cycle. The shift comes despite the Biden administration and Democrats providing the Teamsters with a $36 billion private pension bailout in 2021, the largest in American history, which amounted to approximately $103,000 per Teamster member due to the union's financial mismanagement. Critics within the Democratic Party, including Senator Bernie Sanders, have acknowledged that Democrats have failed to address the needs of the working class, with Sanders specifically criticizing Harris for losing support due to being influenced by billionaire donors. The Teamsters' move to back Republicans in battleground races signals a broader political realignment among union members traditionally aligned with Democrats.