January 12, 2020: Twitter war turns into Twitter diplomacy; Bill Weld's view of campaign coverage; Harry and Meghan versus the British tabloids Reliable Sources

Plus, a thought experiment by James Fallows; Nicholas Kristof and Sheryl WuDunn on their new book "Tightrope;" and the biggest change about campaign coverage in 2020. James Fallows, John Kirby, Hadas Gold, Bill Weld, Nicholas Kristof, Sheryl WuDunn and Sally Buzbee join Brian Stelter.To learn more about how CNN protects listener privacy, visit cnn.com/privacy
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