I don’t know who the next U.S. attorney general will be. But I know I pity that person. Restoring the Justice Department’s reputation in the wake of Eric Holder’s tenure will take a lot of work. You can find out just how big a task it will be in “Obama’s Enforcer: Eric Holder’s Justice Department,” a new book by John Fund and Hans von Spakovsky. Even at a relatively slim 217 pages, it’s quite a bill of indictment. It’s one thing to read about certain cases as they pop up in the news cycle -- an article about a civil-rights...