WASHINGTON, March 3 : U.S. defense contractors, like Lockheed Martin, are expected to follow the Pentagon's order to purge Anthropic's prized AI tools from their supply chains, government contracting and technology attorneys said, even though the Trump administration's ban on their use may fail in court. The expected exodus from Anthropic was a sign of how quickly firms adjust to the Trump administration's preferences, as they seek to win pieces of its trillion-dollar annual budget, government