Trump-appointed judges refuse to block Trump blacklisting of Anthropic AI tech

Ars Technica
April 9, 2026
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A federal appeals court refused to block the Trump administration's blacklisting of Anthropic AI tech.

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A federal appeals court refused to block the Trump administration's blacklisting of Anthropic, denying the AI firm's emergency motion for a stay yesterday. The US Court of Appeals for the District of Columbia Circuit, with a panel including Trump appointees Gregory Katsas and Neomi Rao, will, however, expedite the case and hold oral arguments on May 19. This ruling is a setback for Anthropic, which claims the blacklisting is retaliation for its refusal to allow Claude AI models for autonomous warfare and mass surveillance. President Trump directed all federal agencies to stop using Anthropic technology, and Defense Secretary Pete Hegseth labeled the company a "Supply-Chain Risk to National Security." Anthropic has another ongoing case against the administration where it has seen more success.

What's Being Done

The US Court of Appeals for the District of Columbia Circuit will expedite the case and hold oral arguments on May 19.

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