Allan Lichtman, history professor at American University, says it would be smart for Democrats to unite behind Kamala Harris to retain one of the 13 “keys” to victory he’s outlined for years. He discussed with NewsNation’s Chris Cuomo how the Biden withdrawal adjusts the keys for Harris. #2024election #kamalaharris #allanlichtman "NewsNation Prime" is America’s source for unbiased news offering a full range of perspectives from across the U.S. Weekends starting at 7p/6C. #Prime NewsNation is your source for fact-based, unbiased news for all America. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij