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Anthropic Banned from U.S. Federal Use After DOJ Refuses Unrestricted AI for Military Surveillance

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16

Why it matters

In early 2026, the Trump administration ordered all federal agencies to cease using Anthropic's Claude AI models and designated the company a "Supply-Chain Risk to National Security" under the Federal Acquisition Supply Chain Security Act. The conflict originated when the Department of Defense demanded unrestricted access to Claude for "all lawful purposes," including potential use in autonomous weapons and domestic surveillance. Anthropic refused, citing civil liberties and human rights concerns. On February 27, President Trump issued an immediate cease directive with a six-month phase-out period. By March 5, the DOD's supply-chain designation took effect, barring military contractors from any commercial activity with Anthropic and removing the company from federal procurement systems.

The designation marked an unprecedented application of foreign-adversary supply-chain risk frameworks to a U.S. frontier AI company. Anthropic had held a $200 million DOD contract since 2025 before terminating it over the government's refusal to accept restrictions on surveillance and weapons applications. The move threatened the company's business ahead of a projected IPO. As of April 2026, a federal judge issued a preliminary injunction blocking implementation of the designation and halting Trump's cease directive, restoring Anthropic to federal contracts. The White House is reportedly drafting guidance to allow agencies to bypass the risk designation while developing an AI executive order addressing government use of Anthropic tools.

Attorneys should monitor this case as a test of executive authority over AI procurement and the boundaries of national security designations applied to domestic technology companies. The preliminary injunction signals potential legal vulnerability in the administration's approach. The outcome will likely shape how the government regulates frontier AI labs and whether companies can maintain contractual autonomy over their technology's deployment in weapons and surveillance systems.

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