Something has been going on with Robert Mueller’s investigation of people thought to have played significant roles in the Trump-Russia affair. The special counsel, assigned to investigate “any links and/or coordination between the Russian government and individuals associated with the campaign of President Trump,” has been farming out seemingly important parts of the investigation to offices outside his own.

In April, Mueller referred an investigation of close Trump associate Michael Cohen to federal prosecutors in New York. This month, the U.S. attorney in Washington — not Mueller — indicted Maria Butina on charges of being an unregistered Russian agent. And also this month, when Mueller charged 12 Russian intelligence officers with hacking Democratic Party and Clinton campaign offices, he immediately turned the case over to the Justice Department’s National Security Division for prosecution.