Carolina Amazonians United for Solidarity & Empowerment has been working to organize staffers for the past three years.

A handful of union elections were held at Amazon warehouses in the U.S. in recent years but employees have either rejected unionization or the results continue to be disputed in lengthy court battles. Last November, a federal labor judge ordered a third rerun election at an Amazon warehouse in Bessemer, Alabama, after ruling the company improperly interfered in the vote.