In a slickly produced TikTok video, former President Barack Obama — or a voice eerily like his — can be heard defending himself against an explosive new conspiracy theory about the sudden death of his former chef. “While I cannot comprehend the basis of the allegations made against me,” the voice says, “I urge everyone to remember the importance of unity, understanding and not rushing to judgments.” In fact, the voice did not belong to the former president. It was a convincing fake, generated by