Key witnesses defy White House orders and provide closed-door testimony to Congress.
Events moved quickly in Washington this week as the whistleblower complaint against President Trump became public and house Speaker Nancy Pelosi announced a formal impeachment inquiry.
New York Times op-ed columnist David Leonhardt joined Diane to explain the accusations being made against the president and why he thinks now is the right time for House Democrats to act.
- David Leonhardt Op-ed columnist, The New York Times; former editor, The Upshot, a New York Times website covering politics and policy
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