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‘Pick your battle’: Mehdi Hasan explains the post-Trump debating rules
MSNBC’s Lawrence O’Donnell speaks to fellow MSNBC anchor Mehdi Hasan, author of the new book "Win Every Argument: The Art of Debating, Persuading, and Public Speaking," about the challenges of debating Donald Trump and his allies, whose preferred debate tactic is to put out a “nonstop torrent of lies.”