# Anthropic legal and regulatory tensions with US government > Live situation record from CLSTR: https://clstr.news/situations/anthropic-legal-and-regulatory-tensions-with-us-government > Updated: 2026-09-03T05:09:19.000Z. Sources: 156. Developments: 5. The AI company Anthropic has entered a period of heightened tension with the United States government. To manage expanding international relations and domestic government interactions, Anthropic appointed Mariano-Florentino Cuéllar, a former California Supreme Court justice, as its first chief global affairs officer. This leadership change follows a legal dispute regarding a Pentagon designation that labeled Anthropic a supply-chain risk. In a 59-page decision, U.S. District Judge Rita Lin ruled that the Department of Defense acted illegally, finding the designation was unlawful retaliation for the company’s refusal to allow its Claude AI models to be used for mass surveillance or fully autonomous lethal weaponry. The court determined the government’s actions were arbitrary and capricious, violating Anthropic’s First Amendment rights to free speech and Fifth Amendment rights to due process. Judge Lin noted that national security does not provide a “blank check” to punish critics of the administration. The ruling effectively overturns the blacklisting that had prevented military contractors from doing business with the company. Following the legal victory, the regulatory conflict appears to be subsiding. U.S. Commerce Secretary Howard Lutnick stated that the firm is “back on the right side” of the government, signaling a de-escalation of tensions. This follows earlier friction in June when the Commerce Department imposed temporary export restrictions on Anthropic’s Fable 5 and Mythos 5 models, which were subsequently lifted. As Anthropic moves toward a potential initial public offering (IPO), the resolution of these disputes is viewed as a critical step in stabilizing its standing, particularly as its revenue run rate reportedly reached $65 billion in August. ## Claims - The Pentagon's designation of Anthropic as a supply chain risk was illegal and baseless. (disputed by 42 sources) - The company refused to allow the military to use Claude for surveillance or autonomous weapons due to safety concerns. (corroborated by 43 sources) - The Pentagon's actions violated Anthropic's First Amendment rights through unlawful retaliation. (corroborated by 36 sources) - The company alleged the government violated its Fifth Amendment right to due process. (corroborated by 27 sources) - The designation of Anthropic as a supply chain risk was arbitrary and capricious. (corroborated by 23 sources) - Secretary of Defense Pete Hegseth labeled Anthropic a supply chain risk in February. (corroborated by 4 sources) - Anthropic is back on the right side with the Trump administration. (corroborated by 3 sources) ## Timeline ### 2026-09-03: Anthropic wins legal challenge against Pentagon designation Anthropic won a legal challenge against a Pentagon supply chain risk designation, while new U.S. legislation seeks to grant CISA power to mandate AI kill switches. 5 sources. https://clstr.news/cluster/anthropic-wins-legal-challenge-against-pentagon-designation ### 2026-09-02: Anthropic repairs ties with Trump administration after Pentagon dispute US Commerce Secretary Howard Lutnick says AI firm Anthropic is “back on the right side” of the Trump administration following a legal and regulatory dispute over AI safety and military usage. 10 sources. https://clstr.news/cluster/anthropic-restores-ties-with-trump-administration-amid-ipo-interest ### 2026-08-31: Anthropic wins court ruling against Pentagon supply chain risk designation A U.S. federal judge ruled the Pentagon's designation of Anthropic as a supply chain risk was illegal and retaliatory, overturning restrictions on the AI company's Claude models. 8 sources. https://clstr.news/cluster/anthropic-wins-court-ruling-against-pentagon-supply-chain-blacklist ### 2026-08-27: Anthropic wins legal battle against Pentagon over AI usage restrictions A U.S. federal judge ruled the Pentagon illegally blacklisted AI firm Anthropic, finding the supply chain risk designation was unlawful retaliation for the company's refusal to allow military AI use in weapons. 138 sources. https://clstr.news/cluster/anthropic-wins-court-ruling-against-pentagon-blacklist ### 2026-08-04: Anthropic names Mariano-Florentino Cuéllar chief global affairs officer as US AI tensions rise Anthropic hired former judge Mariano-Florentino Cuéllar as chief global affairs officer to steer U.S. government relations amid Pentagon blacklisting and export controls on its AI models. 3 sources. https://clstr.news/cluster/anthropic-names-mariano-florentino-cullar-chief-global-affairs-officer-as-us-ai-tensions-rise --- Cite as: Anthropic legal and regulatory tensions with US government. CLSTR, https://clstr.news/situations/anthropic-legal-and-regulatory-tensions-with-us-government