In response to the FBI search at Mar-a-Lago, Trump supporters have increased calls for a civil war. Those dangerous threats are being fueled by conspiracy theories, and mistrust of the FBI and Justice Department promoted by many Republican politicians. Barbara Walter, professor at UC San Diego and author of “How Civil Wars Start," joins Laura Barrón-López to discuss. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: TikTok: https://www.tiktok.com/@pbsnews Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour Facebook: http://www.pbs.org/newshour Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe