D.C. Circuit sides with Pentagon, denies Anthropic's bid to block military AI blacklist

By jenkrausz, 
updated on April 11, 2026

The U.S. Court of Appeals for the District of Columbia Circuit on Wednesday rejected Anthropic's emergency request to stop the Department of War from designating the AI company a supply-chain risk, a ruling the administration immediately claimed as a win for military readiness and presidential authority over national defense technology.

The April 8 order denied Anthropic's motion for a stay pending review on the merits. The three-judge panel weighed the competing harms and came down firmly on the government's side, framing the dispute as a contest between one company's bottom line and the commander-in-chief's ability to manage wartime AI procurement.

The court's language left little ambiguity. As Fox News Digital reported, the order stated:

"In our view, the equitable balance here cuts in favor of the government. On one side is a relatively contained risk of financial harm to a single private company. On the other side is judicial management of how, and through whom, the Department of War secures vital AI technology during an active military conflict. For that reason, we deny Anthropic's motion for a stay pending review on the merits."

That phrase, "during an active military conflict", is doing heavy lifting. The court signaled that judges should not be second-guessing the Pentagon's technology choices while troops are in the field.

How the dispute escalated

The collision between Anthropic and the federal government has been building for months. In January, the War Department requested "unrestricted use" of Anthropic's AI tools for "all lawful purposes." Anthropic balked. The company drew two red lines: it would not allow its technology to be used for domestic surveillance of Americans or for lethal autonomous weapons operating without human involvement.

Pentagon spokesperson Sean Parnell pushed back in February, posting on X that the War Department "has no interest in using AI to conduct mass surveillance of Americans (which is illegal) nor do we want to use AI to develop autonomous weapons that operate without human involvement."

That assurance did not settle the matter. The standoff deepened rapidly. President Donald Trump weighed in on February 27 with a Truth Social post declaring he was "directing EVERY Federal Agency in the United States Government to IMMEDIATELY CEASE all use of Anthropic's technology." He added that agencies like the Department of War would get a six-month phase-out period.

War Secretary Pete Hegseth, who won confirmation by a razor-thin 51-50 Senate vote requiring Vice President JD Vance to break the tie, matched the president's tone. Hegseth posted on X that he was "directing the Department of War to designate Anthropic a Supply-Chain Risk to National Security."

A March letter from the War Department formalized the designation, notifying Anthropic that the government had determined use of the company's products posed a "supply chain risk."

The lower court intervened, then the appeals court reversed course

Anthropic did not accept the designation quietly. The company took the fight to federal court in California. Last month, U.S. District Judge Rita Lin in the Northern District of California issued a preliminary injunction blocking the government from implementing the presidential directive, the Hegseth directive, and the supply-chain designation.

Judge Lin's order was carefully worded. It restored the pre-February 27 status quo but did not force the Pentagon to keep buying Anthropic's products. The order stated that the Department of War remained free to "transition to other artificial intelligence providers, so long as those actions are consistent with applicable regulations, statutes, and constitutional provisions."

That lower-court win gave Anthropic temporary relief. But the government appealed, and Wednesday's D.C. Circuit ruling shifted the balance back toward the administration. The appellate panel denied Anthropic's motion for a stay, effectively allowing the supply-chain-risk designation to proceed while the broader legal challenge plays out.

The administration's broader posture, Hegseth's aggressive public case-making on national security, has been consistent: the military, not a Silicon Valley firm, decides which tools go into sensitive defense systems.

Both sides claim partial victories

Acting U.S. Attorney General Todd Blanche celebrated the ruling on X, calling it "a resounding victory for military readiness."

"Our position has been clear from the start, our military needs full access to Anthropic's models if its technology is integrated into our sensitive systems. Military authority and operational control belong to the Commander-in-Chief and Department of War, not a tech company."

Anthropic, for its part, pointed to a different section of the same order. The D.C. Circuit acknowledged that the company "raises substantial challenges to the determination and will likely suffer some irreparable harm during the pendency of this litigation." The court agreed that "substantial expedition is warranted", meaning the full case should move quickly through the appeals process.

An Anthropic spokesperson told Fox News Digital on Thursday:

"We're grateful the court recognized these issues need to be resolved quickly and remain confident the courts will ultimately agree that these supply chain designations were unlawful. While this case was necessary to protect Anthropic, our customers, and our partners, our focus remains on working productively with the government to ensure all Americans benefit from safe, reliable AI."

That statement is worth reading closely. Anthropic still calls the designation "unlawful." It still frames itself as a cooperative partner. And it still insists the courts will eventually vindicate its position. But for now, the company lost the procedural fight that mattered most, the one that would have kept the blacklist on ice while lawyers argued.

The deeper question: who controls military AI?

Strip away the legal filings and what remains is a straightforward power struggle. Anthropic tried to set conditions on how the U.S. military could use its artificial intelligence models. The administration said no private company gets veto power over defense operations. The courts, at least at the appellate level, agreed with the government, for now.

The confirmation fight that brought Hegseth into office foreshadowed this kind of confrontation. Trump argued at the time that an outsider was needed to shake up the Pentagon. Hegseth's willingness to designate a major AI firm a supply-chain risk, over the company's objections and amid active litigation, is the clearest example yet of that shake-up in practice.

President Trump framed the dispute in characteristically blunt terms back in February, saying the United States would never allow what he called "the radical left, woke company to dictate how our great military fights and wins wars." Whether or not one agrees with that characterization of Anthropic, the underlying principle, that defense procurement decisions belong to elected officials and military leaders, not corporate terms-of-service agreements, is one most Americans would recognize as common sense.

The administration has faced political headwinds around Hegseth's standing at various points, but this ruling hands the War Secretary and the White House a concrete legal win at a moment when the Iran conflict makes AI procurement a live operational concern, not an abstract policy debate.

What comes next

The D.C. Circuit's order is not the final word. The court itself acknowledged that Anthropic's legal challenges are "substantial" and fast-tracked the case. A full merits decision is still ahead. The separate preliminary injunction from Judge Lin in California adds another layer of complexity, the two courts are now pulling in different directions on overlapping questions.

Open questions remain. The exact legal claims Anthropic is pressing have not been fully detailed in public filings covered so far. The formal administrative process behind the supply-chain-risk designation, and whether it followed every required regulatory step, will be central to the merits argument. And the practical question of which AI providers the Pentagon will turn to if Anthropic is permanently shut out has not been answered.

The broader political environment around the Iran conflict adds urgency. With American forces engaged and AI tools already integrated into military operations, the courts are being asked to make decisions with immediate battlefield implications.

For the moment, the administration holds the stronger hand. The appellate court weighed a tech company's financial exposure against the government's need to manage wartime AI, and chose the latter without much hesitation.

When a company tries to tell the Pentagon how it may defend the country, it should not be surprised when the courts remind everyone who works for whom.

About jenkrausz

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