AMAZON is arguing in a legal filing that the 88-year-old National Labor Relations Board is unconstitutional, echoing similar arguments made this year by Elon Musk's SpaceX and the grocery store chain Trader Joe's in disputes about workers' rights and organizing.

The Amazon filing, made Thursday (Friday in Manila), came in response to a case before an administrative law judge overseeing a complaint from agency prosecutors who allege the company unlawfully retaliated against workers at a New York City warehouse who voted to unionize nearly two years ago.