Amanpour: Michael Steele, Laurie Santos, Yochai Benkler and Andrea Ghez

Former Chair of the Republican National Committee Michael Steele talks about his decision to support Joe Biden over Donald Trump. Laurie Santos, professor of Psychology at Yale University and host of "The Happiness Lab" podcast, discusses how students are handling this academic year. A new Harvard study led by Yochai Benkler examines how the president harnesses mass media to disseminate and reinforce disinformation about mail-in voter fraud. Benkler joins Hari Sreenivasan to explain his findings. And finally, UCLA professor Andrea Ghez talks about becoming the fourth woman in history to win the Nobel Prize for Physics for her groundbreaking research on black holes.

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