https://www.vice.com/en_us/article/v7egdj/bessemer-union-officially-challenges-amazon-warehouse-vote

The Retail Wholesale and Department Store Union (RWDSU) is formally challenging the results of the union vote at Amazon's Bessemer, Alabama warehouse, alleging that the retail giant owned by the world's richest man "prevented a free and uncoerced exercise of choice by the employees." In the objection filed with the National Labor Relations Board, the RWDSU asserts its objections are grounds to throw out the election results. The workers voted against unionization.

"Working people deserve better than the way Amazon has conducted itself during this campaign," said Stuart Appelbaum, President of the Retail, Wholesale and Department Store Union (RWDSU) in a statement. "We won’t rest until workers’ voices are heard fairly under the law. When they are, we believe they will be victorious in this historic and critical fight to unionize the first Amazon warehouse in the United States."