How Trump’s rhetoric is ‘normalizing overt expressions of racism’

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As Donald Trump trails in the polls, he has increased his use of racist rhetoric and fear in an attempt to boost support. Professor Jelani Cobb tells Lawrence O’Donnell it’s allowed some Trump supporters to publicly express racist views that before could only “be echoed among like-minded people,” something Sirius/XM’s Zerlina Maxwell says “has dangerous consequences.”