Anthropic is attracting an increasing number of supporters in its fight against the U.S. Department of Defense, which last month designated the AI lab as a supply-chain risk after it refused to make concessions on how its AI could be used by the military. In a letter to Defense Secretary Pete Hegseth, U.S. Senator Elizabeth Warren (D-MA) equated the DoD’s decision with “retaliation,” arguing that the Pentagon could simply have terminated its contract with the AI lab, CNBC reports. “I am particularly concerned that the DoD is trying to strong-arm American companies into providing the Department with the tools to spy on American citizens and deploy fully autonomous weapons without adequate safeguards,” Warren wrote, per the report, adding that the barring of Anthropic “appears to be retaliation.” Warren’s words echo many other organizations that have spoken out against the Defense Department’s treatment of Anthropic.…