Amazon’s Constitutional Challenge Fails at Federal Labor Board

Amazon’s lost one of its bids to escape an unfair labor practice case by challenging the constitutionality of the National Labor Relations Board.

The NLRB on Tuesday denied Amazon’s motion to dismiss, saying the company waived its constitutional arguments because it failed to raise them before the case reached the board. But even if Amazon.com Inc. had followed the proper procedure, its claims would fail on the merits, the board added.

The online retail giant is one of a growing list of companies—which also includes Starbucks Corp., SpaceX, and Trader Joe’s—that have responded to NLRB enforcement actions by claiming ...