Gov. Tim Walz of Minnesota delivered a speech introducing himself and formally accepting his nomination to serve as Kamala Harris' running mate. Oprah Winfrey also spoke.This episode: political correspondent Susan Davis, Minnesota Public Radio reporter Clay Masters, senior White House correspondent Tamara Keith, and senior national political correspondent Mara Liasson.*The podcast is produced by Casey Morell and Kelli Wessinger. Our editor is Eric McDaniel. Our executive producer is Muthoni Muturi. **Listen to every episode of the NPR Politics Podcast sponsor-free, unlock access to bonus episodes with more from the NPR Politics team, and support public media when you sign up for The NPR Politics Podcast+ at *plus.npr.org/politics).Learn more about sponsor message choices: podcastchoices.com/adchoices)NPR Privacy Policy)