https://techcrunch.com/2021/04/09/rwdsu-head-says-rerun-election-very-likely-following-amazon-union-vote-loss/

However the outcome of today’s vote count turned out, there was one thing we knew for certain: it wasn’t going to mark the end of the battle between Amazon and the Retail, Wholesale and Department Store Union. With voting having broken overwhelmingly in Amazon’s favor, the union was quick to challenge the results.

The RWDSU was quick to offer TechCrunch a statement from President Stuart Appelbaum after no votes broke the 50% threshold, noting, “We demand a comprehensive investigation over Amazon’s behavior in corrupting this election.”