HMM: Facebook Gave Special Counsel Robert Mueller More Details on Russian Ad Buys Than Congress.

Facebook Inc. FB 0.40% has handed over to special counsel Robert Mueller detailed records about the Russian ad purchases on its platform that go beyond what the company shared with Congress last week, according to people familiar with the matter.

The information Facebook shared with Mr. Mueller included copies of the ads and details about the accounts that bought them and the targeting criteria they used, the people familiar with the matter said. Facebook policy dictates it would only turn over “the stored contents of any account,” including messages and location information, in response to a search warrant, some of them said.

A search warrant from Mr. Mueller would mean the special counsel now has a powerful tool to probe the details of how social media was used as part of a campaign of Russian meddling in the U.S. presidential election. Russia has denied any interference in the election.

That story is behind the WSJ paywall, but Natasha Bertrand’s analysis for Business Insider isn’t:

Legal experts say the revelation has enormous implications for the trajectory of Mueller’s investigation into Russia’s election interference, and whether Moscow had any help from President Donald Trump’s campaign team.

“This is big news — and potentially bad news for the Russian election interference ‘deniers,'” said Asha Rangappa, a former FBI counterintelligence agent.

Rangappa, now an associate dean at Yale Law School, explained that to obtain a search warrant a prosecutor needs to prove to a judge that there is reason to believe a crime has been committed. The prosecutor then has to show that the information being sought will provide evidence of that crime.

Mueller would not have sought a warrant targeting Facebook as a company, Rangappa noted. Rather, he would have been interested in learning more about specific accounts.

“The key here, though, is that Mueller clearly already has enough information on these accounts — and their link to a potential crime to justify forcing [Facebook] to give up the info,” she said. “That means that he has uncovered a great deal of evidence through other avenues of Russian election interference.”

It also means that Mueller is no longer looking at Russia’s election interference from a strict counterintelligence standpoint — rather, he now believes he may be able to obtain enough evidence to charge specific foreign entities with a crime.

If foreigners are buying political ads, we need to know about it. It would also be useful to know just how much foreign money Barack Obama illegally accepted in 2008 and 2012, and what protections we can take in the future against such meddling.