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.

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.

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.

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.

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.

SpaceX and Amazon are at the forefront of a corporate-led effort to monumentally change the labor agency. On Monday, attorneys for the two companies will try to convince a panel of judges at the Fifth Circuit Court of Appeals that the labor agency,