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.

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

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.

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

SpaceX and Amazon are asking the Fifth Circuit Court of Appeals to find the National Labor Relations Board unconstitutional. The federal agency is tasked with enforcing workers' right to organize.

A U.S. labor board whose enforcement powers are being challenged in a series of lawsuits is set to defend itself from attacks by Amazon.com and Elon Musk's SpaceX in a conservative U.S. appeals court,

SpaceX and Amazon have initiated a bold legal challenge against the National Labor Relations Board (NLRB), questioning its constitutionality and power.

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.