It’s not the crime, it’s the coverup, goes the old Washington cliché. In the case of the Fast and Furious gun-walking scandal, it’s both. As Attorney General Eric Holder gets ready to face more congressional grilling Thursday, something’s clearly rotten at the Justice Department. The stench goes all the way to the top — to Holder. Friday, the feds disclosed documents that show that despite Holder’s claim during congressional testimony that he’d only learned of F&F “a few weeks” earlier (a claim later amended to “a couple of months”), he has known (or should have known) about it all along...