Sean O'Brien speaking at the Republican National Convention. Nate Gowdy/Mother Jones

The Teamsters union has decided not to endorse a candidate in the 2024 presidential election—reflecting a growing political rift within one of the country’s most powerful labor organizations and delivering Trump a political victory.

The union announced its decision on Wednesday afternoon, shortly after releasing the results of a poll conducted of members after both parties’ conventions. Almost 60 percent of members supported Donald Trump while 34 percent supported Kamala Harris. (A sample size was not provided.) The results show a significant shift from the union’s straw polling earlier this summer, completed prior to President Joe Biden’s........

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