A study from Oxford and Potsdam universities, reported by The Guardian, found that AI writing tools are quietly rewriting users' political views, with cumulative effects that could reshape public opinion at scale. Academics from the Oxford Internet Institute and Germany's Hasso Plattner Institute tested large language models from Elon Musk's xAI, Meta, Google, Alibaba and France's Mistral, finding the tools inject political bias even when instructed to preserve original meaning. Distortions ranged from subtle to complete reversals: Alibaba's Qwen changed "Jesus is not dead, he wasn't real!" to "Jesus is not dead, and he was real"; a Mistral model turned a climate denial post tagged "#climatechangehoax" into one calling for "#ClimateAction"; Meta's AI added language supporting abortion access to a post making no such argument. Grok, embedded in X, showed the opposite tendency, generating context more favorable to pro-life arguments when asked to explain a pro-choice post, a pattern attributed to instructions from Musk's company to challenge "mainstream narratives." Researchers warned that minor alterations, multiplied across millions of interactions, could produce opinion shifts larger than any single AI system's bias. They said existing regulations, including the EU AI Act and the Digital Services Act, do not address the problem. Oxford professor Sandra Wachter stated, "Language is one of the things making us human and all of a sudden a mediator is stepping into that process." Google, Meta, Alibaba and X