William Cohen, the veteran Republican and former Defense Secretary, joins Christiane Amanpour to discuss a potential second term for President Trump. He says this would could spell the end of democracy and pave the way for tyranny. Clifford Stott, social psychology professor at Keele University, discusses how to prevent protests turning violent. For example, he explains how officers can and should use dialogue to defuse tensions with large crowds. Then our Michel Martin speaks to Norm Stamper, former Seattle Police chief and author of “To Protect and Serve: How to Fix America's Police,” about the toxic police culture he was once a part of and how best to remedy it.To learn more about how CNN protects listener privacy, visit cnn.com/privacyLearn more about your ad choices. Visit podcastchoices.com/adchoices