Tonight on The Last Word: Former President Barack Obama says that democracy "may not survive" GOP election deniers. Plus, Lt. Gov. Mandela Barnes looks to unseat Senator Ron Johnson in Wisconsin, and Katie Hobbs speaks to how democracy is on the ballot in Arizona. Also, Robert Draper details how Marjorie Taylor Greene went from fringe to mainstream in his new book. Sen. Maggie Hassan, Adm. Mike Franken, Lt. Gov. Mandela Barnes, Katie Hobbs, and Robert Draper all join Lawrence O'Donnell.