Amazon and SpaceX are seeking to hamstring the National Labor Relations Board, asking a court to declare its processes for upholding labor law unconstitutional. But judges on a three-person panel appeared skeptical when the companies presented their arguments Monday.

A panel of U.S. judges on Monday seemed likely to rule that Amazon.com and Elon Musk's SpaceX were too quick to bring their challenges to the National Labor Relations Board's structure to an appeals court.

A ruling in favor of the companies could immensely diminish – or paralyze – the nearly century-old agency, which is tasked with enforcing labor laws and settling labor-related complaints workers

As the (NLRB) faces escalating scrutiny from corporate giants SpaceX and Amazon (NASDAQ: AMZN), the stakes for American labor rights have rarely been higher. The two

Amazon and SpaceX are just among the rising number of companies that have opted to challenge the labor agency's structure. Lawsuits against the NLRB have been filed around the country, stating that a number of the processes violated U.S. Constitution. The case of Amazon and SpaceX are just among those that already reached the appellate court.

The oral arguments represented the latest legal attack from corporations against the 89-year-old National Labor Relations Board, buoyed by the U.S. Supreme Court's ruling this year in SEC v. Jarkesy.

Amazon and SpaceX say the government agency violates the separation of powers provision and its administrative law process is unconstitutional.

Amazon and SpaceX face dismissal of NLRB challenges as judges question premature appeals over alleged labor law violations.

Attorneys for Amazon and Elon Musk’s SpaceX argued in a federal appeals court Monday that the National Labor Relations Board’s structure is unconstitutional, advancing a legal fight that may last into the Trump administration where Musk is expected to oversee bureaucratic cost-cutting.