An unpredictable president has been impeached. Now what? Leaders in both parties are fighting over the details of the Senate trial. When will it happen? Will there be witnesses? And a day after President Trump lashed out at a deceased congressman and his widow, it's clear that he's capable of anything. Plus, CNN political director David Chalian previews tonight's Democratic debate with CNN senior Washington correspondent Jeff Zeleny and CNN political correspondent Abby Phillip.To learn more about how CNN protects listener privacy, visit cnn.com/privacy

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