Bill Ackman drew attention to an allegation that the rapid spread of Anthropic researcher Jacob Coxon’s resignation was part of a broader effort to build support for tougher artificial intelligence regulation. Coxon, who previously worked at OpenAI and spent three years conducting pretraining research at both companies, announced his resignation on X on Tuesday, writing that neither company was acting responsibly and that the industry was gambling with people’s lives. Parker Thayer, an investigative researcher at Capital Research Center, argued that the post showed signs of a sophisticated, well-funded public-relations campaign supporting Democratic efforts to regulate AI. He pointed to the rapid amplification by AI-policy advocates, Coxon’s prior scholarship from a Dustin Moskovitz-linked philanthropic organization, and relationships between AI-policy groups and donors associated with Anthropic investors. Ackman shared Thayer’s post and responded, "Interesting," after previously describing Coxon’s resignation as "concerning." Coxon and Anthropic did not immediately respond to Benzinga’s request for comment. The episode comes as Sen. Bernie Sanders (I-Vt.) has urged OpenAI, Anthropic and Meta Platforms, Inc. to stop building machines that humans cannot control. Anthropic is also working toward a potential IPO that investors and bankers are targeting at a valuation of nearly $2 trillion, with a fundraising haul of more than $86 billion as early as mid-October.