Sunday August 23, 2020: On eve of GOP convention, Trump's sister heard on tape calling him "cruel"

As the President gears up for this week's Republican National Convention, his older sister Maryanne Trump Barry was secretly recorded calling her brother a liar with "no principles."

Plus, a look back at last week's all-virtual Democratic Convention.

And can the states handle a record number of Americans voting by mail in the November election?

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On today's show: CNN's Kaitlan Collins and Toluse Olorunnipa of the Washington Post; Dr. Ashish Jha of the Harvard Global Health Institute and Dr. Megan Ranney of Brown University; Jonathon Martin of the New York Times and Laura Barron Lopez of POLITICO; Michigan Secretary of State Jocelyn Benson; Penn State professor Sarah Townsend.

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