Brian Lehrer Weekend: Senator Elizabeth Warren, Author Arundhati Roy, Amtrak's CEO on 'The Summer of Hell'

Sen. Elizabeth Warren, D-Mass., confers with Sen. Mazie Hirono, D-Hawaii, left, before the start of a Senate Armed Services Committee hearing at the Capitol in Washington, Tuesday, June 20, 2017.
( J. Scott Applewhite / AP Photo )

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