A spurious prosecutor futilely investigated four nobodies who did not commit the nonexistent crimes they were ridiculously accused of. …

It is worth noting that Rosenstein authorized Mueller to investigate other crimes — e.g., irregularities regarding payments Manafort received from Ukraine, and whether Papadopoulos and Flynn should have registered with the Justice Department as foreign agents due to work they’d allegedly done for, respectively, Israel and Turkey. Putting aside whether there was a sufficient factual basis for these allegations (over which only Manafort was eventually prosecuted), they had nothing to do with the Trump–Russia probe. That is, there was no conceivable conflict warranting appointment of a special counsel, no reason why the Justice Department could not have investigated these matters in the normal course of business.

Mueller, to the contrary, was appointed only because an investigation of President Trump and his campaign could have presented a conflict for the Trump Justice Department. Whether it did depended, of course, on whether there was a real reason to conduct a criminal probe of President Trump, despite the fact that the FBI’s former director, James Comey, told Trump multiple times that he was not under investigation.

From the looks of things, then–deputy AG Rosenstein not only had nothing when he appointed a special counsel; he further had abundant reason to know he had nothing.