A top lawmaker on the Senate Armed Services Committee has requested a briefing from the Pentagon on its escalating feud with AI startup Anthropic, which has prompted the Trump administration to threaten to declare the company a supply chain risk.

“I’ll withhold judgment until I’ve had my briefing,” Sen. Mike Rounds (R-S.D.), chair of the panel’s cybersecurity subcommittee, told reporters Tuesday, in response to questions from POLITICO about the unprecedented move.

A supply chain risk designation would result in Anthropic being blacklisted from government contracts — something typically reserved for firms with ties to U.S. foreign adversaries…

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