Federal Judge Blocks Trump Administration's Ban on Anthropic, Rules Action Likely Unconstitutional Retaliation

In a stunning rebuke to the Trump administration, a federal judge in San Francisco issued a preliminary injunction on Thursday stopping the government from implementing its blacklist of AI company Anthropic and its Claude models across federal agencies. Judge Rita Lin granted Anthropic's emergency request just two days after a heated courtroom hearing, effectively freezing both Defense Secretary Pete Hegseth's February declaration of Anthropic as a "supply chain risk" and President Trump's March directive banning all federal agencies from using Claude technology.

The ruling centers on a explosive clash between national security claims and free speech protections. Lin's language was particularly sharp, writing that "nothing in the governing statute supports the Orwellian notion that an American company may be branded a potential adversary and saboteur of the U.S. for expressing disagreement with the government." She explicitly found that punishing Anthropic for bringing public scrutiny to the government's contracting position constitutes "classic illegal First Amendment retaliation." This marks a significant legal victory for Anthropic, which became the first American company ever to be publicly designated a supply chain risk—a label historically reserved for foreign adversaries.

The conflict between Anthropic and the Trump administration traces back to a breakdown in negotiations over the company's $200 million Pentagon contract signed in July. As Anthropic began deploying Claude across the DOD's classified networks and GenAI.mil platform in September, the Pentagon demanded unfettered access to the models for all lawful purposes. Anthropic refused, insisting on guardrails to prevent the technology from powering fully autonomous weapons or domestic mass surveillance. When negotiations stalled, the administration moved swiftly: Hegseth declared Anthropic a supply chain risk in late February, forcing defense contractors including Amazon, Microsoft, and Palantir to certify they don't use Claude, while Trump ordered a six-month phase-out of all federal Claude usage, calling Anthropic a "Radical Left AI company."

Despite the preliminary injunction victory, the legal battle is far from over. Because the Trump administration invoked two separate statutory authorities to justify its actions, Anthropic must fight the case in two different courts—this San Francisco federal court and the U.S. Court of Appeals in Washington, where it has filed a second suit challenging the Pentagon's supply chain risk designation. A final verdict could still be months away, leaving both sides preparing for extended litigation over whether the government has the authority to blacklist a domestic AI company over policy disagreements.