An anonymous congressman has dropped a bombshell election-year book that confirms why Americans hate their national government and have rallied to anti-establishment presidential candidates like Donald Trump. The veteran politician lays bare a rotten and corrupt Congress enslaved by lobbyists and interested only in re-election in an anonymous, 65-page manifesto called “The Confessions of Congressman X.” “Like most of my colleagues, I promise my constituents a lot of stuff I can never deliver,” he admits. “But what the hell? It makes them happy hearing it . . . My main job is to keep my job.” The House member —...