By Kanishka Singh WASHINGTON (Reuters) – OpenAI CEO Sam Altman met Republican U.S. House of Representatives Speaker Mike Johnson on Capitol Hill on Thursday and the two discussed the risks of artificial intelligence, the lawmaker’s office and the ChatGPT maker’s boss said. WHY IT IS IMPORTANT The administration of Democratic U.S. President Joe Biden has been pressing lawmakers for AI regulation, but a polarized U.S. Congress, where Republicans control the House and Democrats have a Senate majority, has made little headway in passing effective regulation. The rise of AI has fed a host of concer…