Three white supremacists have pleaded guilty to a plot to spark a national race war by attacking power grids throughout the United States, the feds announced Wednesday. According to the Department of Justice, the three men—Christopher Brenner Cook, 20, of Columbus, Ohio; Jonathan Allen Frost, 24, of Katy, Texas; and Jackson Matthew Sawall, 22, of Oshkosh, Wisconsin— conspired to sow chaos by attacking regional electrical substations, expecting “the damage would lead to economic distress and civil unrest.” Frost and Cook met in the fall of 2019 and concocted initial plans to attack a power grid, prosecutors said. Their recruitment process...