How did Americans become so divided? And how did we come so close to overturning the results of a presidential election? These are some of the questions at the heart of the new book 'Wildland,' by 'New Yorker' staff writer Evan Osnos. Osnos bookended his coverage of Trump by reporting on Trump's white nationalist support during his 2016 campaign and the attack on the capital by Trump supporters after the 2020 election. Osnos is also the author of a book about Joe Biden, and has profiled Democratic Sen. Joe Manchin. He'll offer some insights into Manchin and his complicated relationship with Biden, now that Manchin holds the key vote on infrastructure and voting rights legislation.Also, Maureen Corrigan reviews 'The Fortnight in September,' by R.C. Sherriff.