type: timeline_event
On March 16, 2026, a broad coalition of technology companies, industry groups, and individual researchers filed amicus curiae briefs in support of Anthropic's challenge to the Pentagon's supply chain risk designation, ahead of the March 24 preliminary injunction hearing before Judge Rita Lin in the Northern District of California. The filing represented the most unified public stance the AI industry had taken against the administration's use of procurement blacklisting as a policy enforcement tool.
TechNet, a trade association representing major defense technology contractors including Microsoft, Amazon Web Services, and Google Cloud, filed a brief warning that the designation had transformed federal procurement from a merit-based system into one "contingent on political favor." The organization argued that if the government could blacklist a domestic AI company for disagreeing on safety policy, no technology firm could safely negotiate contract terms without fearing retaliation. Separately, OpenAI CEO Sam Altman publicly stated that while he disagreed with some of Anthropic's positions on military AI, he also disagreed with the blacklist designation, calling it "a tool designed for foreign adversaries being used against an American company."
A group of 37 researchers from OpenAI, Google DeepMind, and academic institutions filed their own brief focused on the technical implications, arguing that the designation would chill AI safety research by signaling that companies maintaining ethical red lines would face government punishment. The brief cited the chilling effect on responsible AI development as a national security concern in its own right, noting that if companies concluded safety positions were career-ending, the result would be less safe military AI systems, not more compliant ones. The combined amicus filings represented a rare moment of near-unanimity in an industry that had been deeply divided over the appropriate relationship between AI companies and the defense establishment.