Rosenstein, instead, put the cart before the horse: Mueller was invited to conduct a fishing expedition, a boundless quest to hunt for undiscovered crimes, rather than an investigation and prosecution of known crimes.

That deviation, it turns out, is not the half of it. With Rosenstein’s passive approval, Mueller is shredding Justice Department charging policy by alleging earth-shattering crimes, then cutting a sweetheart deal that shields the defendant from liability for those crimes and from the penalties prescribed by Congress. The special counsel, moreover, has become a legislature unto himself, promulgating the new, grandiose crime of “conspiracy against the United States” by distorting the concept of “fraud.”

Why does the special counsel need to invent an offense to get a guilty plea? Why doesn’t he demand a plea to one of the several truly egregious statutory crimes he claims have been committed?

Good questions.