'Dump Trump': Former GOP Lt. Governor sends message to Republican voters

Former Georgia Republican Lt. Gov. Geoff Duncan delivered a speech on the third night of the Democratic National Convention in Chicago in which he slammed the Republican party. #CNN #News Want to stay up to date on the day’s top stories? Sign up for CNN’s 5 Things newsletter, and we’ll give you the 5 biggest stories you need to know, videos people are watching, and more! Sign up here: https://www.cnn.com/newsletters/5-thi...