This episode is about a seemingly simple question: Was there a Joe Biden cover-up?

Jake Tapper and Alex Thompson’s new book argues there was. “Original Sin: President Biden’s Decline, Its Cover-Up, and His Disastrous Choice to Run Again” details how Biden’s top advisers closed the circle around him and tried to conceal the extent of his decline.

But I think the story here is more complicated. If Biden’s top advisers were misleading the public, I think they were also lying to themselves. And if there was a cover-up, it had a lot of holes; voters had been telling pollsters they were worried about Biden’s age for years.

So I wanted to have Tapper on the show to talk about the discoveries in his book, but also about some of the bigger questions raised by the Democratic Party’s decision to almost renominate Biden: How do you see what is right in front of your eyes? How do you avoid letting loyalty to a person or a party blind you?

This episode contains strong language.

Mentioned:

“Democrats Have a Better Option Than Biden” by Ezra Klein

“Behind Closed Doors, Biden Shows Signs of Slipping” by Annie Linskey and Siobhan Hughes

Book Recommendations:

Lorne by Susan Morrison

Hitler’s People by Richard Evans

The Holy Roller by Andy Samberg, Joe Trohman and Rick Remender

Thoughts? Guest suggestions? Email us at [email protected].

You can find the transcript and more episodes of “The Ezra Klein Show” at nytimes.com/ezra-klein-podcast. Book recommendations from all our guests are listed at https://www.nytimes.com/article/ezra-klein-show-book-recs.html

This episode of “The Ezra Klein Show” was produced by Elias Isquith. Fact-checking by Kelsey Kudak. Our senior engineer is Jeff Geld, with additional mixing by Aman Sahota. Our executive producer is Claire Gordon. The show’s production team also includes Marie Cascione, Annie Galvin, Michelle Harris, Rollin Hu, Marina King, Jan Kobal, Kristin Lin and Jack McCordick. Original music by Pat McCusker. Audience strategy by Kristina Samulewski and Shannon Busta. The director of New York Times Opinion Audio is Annie-Rose Strasser.

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