Ever since New York-based Amazon warehouse workers voted to unionize last year, Amazon has fought hard to invalidate that vote by claiming the union election was unfair. The company submitted hundreds of pages of evidence to the National Labor Relations Board, but seemingly none of it swayed the agency. Yesterday, an NLRB official ruled that Amazon’s evidence was insufficient to overturn the election. The ruling means that the Amazon Labor Union (ALU) has officially been certified to represent Amazon employees, and Amazon may finally have to give up its fight and sign the company’s first union contract with workers.