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. Sign up here to get The Daily in your inbox each morning. And for an exclusive look at how the biggest stories on our show come together, subscribe to our newsletter. Background reading: In Washington, policy revolves around Joe Manchin. Read Jonathan Martin’s exploration of why the senator likes it that way. For more information on today’s episode, visit nytimes.com/thedaily. Transcripts of each episode will be made available by the next workday.