Guests: Marc Elias, Ari Berman, Mary Peltola, David Wallace-Wells

Tonight: Marc Elias on the multi-front fight against the anti-democratic threats across the country. Then, how the Georgia Senate race got somehow crazier. Plus, did Sarah Palin just endorse her opponent in Alaska? And David Wallace-Wells on the new climate reality coming into view—and why there may actually be a case for optimism.