Nature, Published online: 26 February 2026; doi:10.1038/d41586-026-00602-z
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Nearly two hours after President Donald Trump announced on Truth Social that he was banning Anthropic products from the federal government, Secretary of Defense Pete Hegseth took it one step further and announced that he was now designating the AI company as a "supply-chain risk," which Anthropic says it is willing to challenge in court.