Guests: Sen. Sheldon Whitehouse, Harry Litman, Barb McQuade, Rep. Elissa Slotkin, Jeff Sharlet

The former vice president is compelled to give sworn testimony about his boss's coup. Tonight: What this means for criminal case against Trump—and what this means for the rule of law. Then, how do you stop gun violence from killing kids in schools? Tonight: the maddening reality of a government that has given up, the awful truth of the cult of the AR-15, and author Jeff Sharlet on his new book describing what he calls America's "slow civil war.”