Journalist: Michael Flynn's testimony was shocking.

US national security adviser to former President Donald Trump and retired general Michael Flynn has become a prominent figure in the far-right movement. John Avlon of Reality Check is joined by Michelle Smith of the Associated Press to talk about how Christian nationalism and cultural war rhetoric dominate the rallies on his "ReAwaken America" tour. Michael Flynn's Holy War, a new documentary by FRONTLINE on PBS and the Associated Press, focuses on his role as a "Christian warrior" for conspiracy theorists, extremists, and election deniers.