A federal judge on March 24 seemed receptive to Anthropic’s request to temporarily block the Department of War from continuing to designate the AI company as a supply-chain risk.

The designation, under a federal law designed to protect military systems from foreign sabotage, functions as a blacklist, preventing the company from doing business with the federal government and its contractors.

If the block is granted, the company would be able to continue doing business with federal agencies and their contractors while the lawsuit moves forward in court.

The AI developer sued the department in the federal court’s Northern California district on March 9, after the federal government issued the designation, citing its national security concerns about the company. Anthropic also filed a separate lawsuit the same day over the designation in the U.S. Court of Appeals for the District of Columbia Circuit.

President Donald Trump and War Secretary Pete Hegseth previously announced a federal boycott of Anthropic, directing federal agencies, contractors, and suppliers to end ties to the company.

On social media, Trump said Anthropic was attempting to “strong-arm” the federal government and officials elected by the American people by dictating its military policy.

“WE will decide the fate of our Country—NOT some out-of-control, Radical Left AI company run by people who have no idea what the real World is all about,” Trump said in a Feb. 27 Truth Social post.

The lawsuits came after Anthropic said it declined to change the user policy for its AI product, Claude, to remove safety guardrails preventing its use for mass surveillance and fully autonomous weapons.

The Department of War has said that it has no intent to use Claude for those purposes.

The department said on March 5 that the issue comes down to ensuring the military can use technology for “all lawful purposes.”

“The military will not allow a vendor to insert itself into the chain of command by restricting the lawful use of a critical capability and put our warfighters at risk,” the Pentagon said in a statement provided to multiple news outlets.

Anthropic’s technology is embedded in classified military platforms, including those that are already in use in current U.S. operations against the Islamic Republic of Iran in Operation Epic Fury.

The company alleged that the supply-chain risk designation constitutes unlawful retaliation and that it could lose billions of dollars if the federal boycott of its products continues. The designation requires that defense contractors certify that they are not using Claude when working with the department.

At a preliminary injunction hearing in San Francisco on March 24, U.S. District Judge Rita F. Lin said the department’s actions against the company were “troubling” because they did not seem “tailored to the stated national security concerns,” and looked like “an attempt to cripple Anthropic.”

If the department were worried “about the integrity of the operational chain of command, [it] could just stop using Claude,” without banning Anthropic “from ever having another government contract,” she said.

She said the supply-chain risk designation applies to “adversaries of the U.S. government who may sabotage its technology systems.” Such designations typically apply to foreign intelligence, terrorists, and other hostile actors, the judge said.

Lin expressed concern that the government might be trying to punish Anthropic for “criticizing the government’s contracting position in the press,” adding that such punishment would violate the Constitution’s First Amendment.

Also at the hearing, Anthropic’s attorney, Mike Mongan, said the designation was the first time a U.S. company has been designated as a supply-chain risk.

“Everything we stand accused of in this proceeding is entirely above board,” Mongan said, adding the company has sincere concerns about the “profound implications” of using its AI tools for mass surveillance and fully autonomous weapons.

Deputy Assistant U.S. Attorney General Eric Hamilton said that the government’s national security concerns outweighed any alleged violations of Anthropic’s rights.

Given the company’s concerns about how the government will use its technology, the Department of War is worried that Anthropic may sabotage or subvert systems, possibly through technology updates, Hamilton said.

Mongan said the government has not identified any legal authority for the federal boycott of Anthropic. He urged the court to grant a preliminary injunction against the supply-chain risk designation, arguing the company was likely to succeed at trial on First Amendment and other grounds.

Hamilton told the court it should deny the injunction.

Failing to do so could allow a technology company to “gain leverage over the Department of War and decide which missions it can conduct,” the government lawyer said.

Anthropic asked Lin to rule on the company’s motion to stay the designation by March 26, but she is not required to meet that suggested deadline.

“I anticipate issuing an order in the next few days,” the judge said as she concluded the hearing.

Stacy Robinson, Aldgra Fredly, and The Associated Press contributed to this report.

This article by Matthew Vadum appeared March 24, 2026, in The Epoch Times.