Summary: In the days after the latest indictment of former President Trump, violent rhetoric has been escalating in online forums and far-right militia groups. This, coupled with heated and combative messaging from Trump and his Republican allies, has extremism watchers on high alert. Amna Nawaz discussed that with Jeff Sharlet, writer of "The Undertow: Scenes from a Slow Civil War." PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
