CBS Evening News with Norah O'Donnell, 08/19/24

A special edition of the "CBS evening news" from the democratic national convention, what we are learning about president Biden's speech as the torch is passed to his vice president, less than a month after shaking up the race to the white house. Chicago prepares for thousands of protesters as Americans react to the Harris campaign, now narrowly leading and new poles.  Learn more about your ad choices. Visit megaphone.fm/adchoices