A source present at the taping says James Comey's interview with ABC's George Stephanopoulos, airing Sunday at 10 p.m. as a "20/20" special, is "going to shock the president and his team."

The source said Comey's comments, in his first interview since being fired by President Trump last May, will generate headlines and "certainly add more meat to the charges swirling around Trump."

According to the source:

  • The Comey interview left people in the room stunned — he told George things that he’s never said before.
  • Some described the experience as surreal. The question will be how to fit it all into a one-hour show.
  • Comey answered every question.
  • If anyone wonders if Comey will go there, he goes there.

What's next: Comey's book, "A Higher Loyalty," is out next Tuesday. He taped the interview Monday at his Washington-area home.

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Why it matters: The debut speech on Wednesday underscored the dual roles that Harris will take on for the rest of the campaign — humanizing Biden during a moment of national crisis and "prosecuting" the case against Trump as a failed president.

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Joe Biden introduces Kamala Harris in first joint appearance

Joe Biden formally introduced Sen. Kamala Harris as his running mate on Wednesday, telling a socially distanced audience in a Wilmington, Del., gymnasium: "I have no doubt that I picked the right person to join me as the next vice president of the United States of America."

Why it matters: Harris is a historic pick for vice president, becoming the first Black woman and first South Asian woman to be named to a major-party U.S. presidential ticket. "Kamala knows how to govern," Biden said. "She knows how to make the hard calls. She is ready to do this job on day one."