Professor Gary W. Gallagher, one of the world's leading Civil War experts, talks to us about America's long history of polarization; Professor Ben Burgis, columnist for Jacobin, on his way to Nevada to knock on doors for Bernie; Alan Minsky, executive director of Progressive Democrats for America, on whether Wednesday's debate moved the needle for Warren; The Reverend Barry W. Lynn has some ideas on how Bloomberg should spend his billions; Joshua Grossman, founder of Progressive Punch, on who are the most progressive politicians in Washington and who are the least; Liam McEneaney and David answer listener questions and voice mails; David "Citizen" Bacon talks to New Hampshire. Turns out the Old Confederacy wasn't too keen on States Rights. Bernie's ability to build coalitions might surprise you. Bloomberg offers anyone who watched Wednesday's debate a generous nondisclosure agreement. Leave a voicemail for Liam and David at 202-670-2752 and maybe we'll play it on the show. Maybe. Time Code: Professor Gary Gallagher (:41) Ben Burgis & Alan Minsky (43:58) Joshua Grossman (1:41:24) The Rev. Barry Lynn (2:27:41) Liam McEneaney (3:57:55) Citizen Bacon (5:00:32)