California Governor Gavin Newsom's call for a nationwide billionaire tax has ignited a fierce online debate with tech titans Elon Musk and David Sacks. Newsom argues a federal approach is necessary to prevent the ultra-wealthy from relocating to avoid state taxes. Musk responded with a mocking meme, to which Newsom retorted about taxing trillionaires. Sacks criticized Newsom for not blocking a state-level "Billionaire Tax Act," suggesting a move to Texas.