Choooo-choooo. Not since Casey Jones has there been a train wreck as spectacular as the one in which the district attorney of Fulton County ran off the rails in her effort to prosecute President Trump for election interference. With each passing challenge to the way the D.A., Fani Willis, was conducting the case, she vowed to press on — saying, at one point, “I do think there are efforts to slow down this train, but the train is coming.”