Microsoft backs Anthropic in lawsuit against Trump admin
Source: The Hill
03/10/26 5:24 PM ET
The technology giant Microsoft has filed an amicus brief in Anthropic’s case against the Trump administration, urging the court to temporarily block the implementation of the Pentagon labelling the Claude-maker as a supply chain risk.
The filing is a significant development for Anthropic, which first filed a complaint against the administration on Monday over the Pentagon’s determination and President Trump’s recent order for federal agencies to cease use of Anthropic’s AI products after negotiations over safety guardrails fell apart. A Microsoft spokesperson told The Hill on Tuesday that the company believes “everyone involved shares common goals and we need time and a process to find common ground.”
“The Department of War needs reliable access to the country’s best technology,” the spokesperson said. “And everyone wants to ensure AI is not used for mass domestic surveillance or to start a war without human control. The government, the entire tech sector, and the American public need a path to achieve all these goals together.”
The filing comes just hours before a federal judge in northern California will take up Anthropic’s request for a temporary block of the designation. Anthropic also filed suit in the D.C. federal appeals court, requesting a review of the Pentagon’s determination.
Read more: https://thehill.com/policy/technology/5777742-microsoft-backs-anthropic-ai-case/
Link to FILING (PDF) - https://storage.courtlistener.com/recap/gov.uscourts.cand.465515/gov.uscourts.cand.465515.34.0.pdf
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