A plan of action for how a second special counsel can investigate the FBI and Justice Department is spelled out in a point-by-point letter submitted by two Republican senators. They specifically want to know whether former FBI Director James B. Comey lied to them and had a plan to double-cross President Trump. Senate Judiciary Committee Chairman Charles E. Grassley of Iowa and Sen. Lindsey Graham of South Carolina sent a letter last week to Attorney General Jeff Sessions. They and two other Republicans want a special counsel with the powers of the Trump-Russia probe’s Robert Mueller to investigate suspected Justice...