Plus: OpenAI’s Fidji Simo to take medical leave as part of leadership changeup ahead of planned IPO. And a judge rejects the Justice Department’s bid to renew subpoenas against Federal Reserve Chair Jerome Powell. Katherine Sullivan hosts. Sign up for WSJ’s free What’s News newsletter. An artificial-intelligence tool assisted in the making of this episode by creating summaries that were based on Wall Street Journal reporting and reviewed and adapted by an editor.