Representing a vanishing brand of Democratic politics that makes his vote anything but predictable, Senator Joe Manchin of West Virginia has become the make-or-break legislator of the Biden era.

We explore how and why Mr. Manchin’s vote has become so powerful.

Guest: Jonathan Martin, a national political correspondent for The New York Times.

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Background reading:

In Washington, policy revolves around Joe Manchin. Read Jonathan Martin’s exploration of why the senator likes it that way.

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Joe Manchin vs. the Democratic Party