After his text messages about President Trump were made public, Peter Strzok, a high-ranking F.B.I. agent who played a pivotal role in the Russia investigation, became a punching bag for Republican lawmakers. So why did he offer to testify before them? Guest: Michael S. Schmidt, who covers national security and federal investigations for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.

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