Last month, OpenAI, the maker of the ChatGPT chatbot, said it was working to prevent abuse of its tools in elections, partly by forbidding their use to create chatbots that pretend to be real people or institutions. In recent weeks, Google also said it would limit its A.I. chatbot, Bard, from responding to certain election-related prompts “out of an abundance of caution.” And Meta, which owns Facebook and Instagram, promised to better label A.I.-generated content on its platforms so voters could more easily discern what material was real and what was fake.