While the biggest news of the day is the indictments Robert Mueller has handed down against former President Donald Trump aides Paul Manafort and Rick Gates, today he also released a plea bargain with a heretofore minor figure in the Russia scandal by the name of George Papadopoulos. And that could actually be the day’s biggest news.

That’s because while Manafort and Gates sure look like they’re going to jail, as of yet they aren’t cooperating with Mueller’s investigation. Papadopoulos is, which means that he likely has information that will lead Mueller closer to the heart of the case.

Papadopoulos was a junior foreign policy adviser to the Trump campaign. In August we learned that he had tried to set up meetings between Trump officials — and even Trump himself — with representatives of the Russian government. At the time, his suggestion was characterized as having been rejected by other Trump officials as inappropriate while Trump was still a candidate and not yet president.

But now that we’ve seen the details of Papadopoulos’ plea, it sure looks like that wasn’t the whole story.

Papadopoulos has agreed to plead guilty to lying to the FBI about his contacts with Russians. Specifically, he falsely claimed that they had occurred before he joined the campaign in March 2016. He had communication with a professor who had contacts in the Russian government; this professor told him that the Russians had “dirt” on Hillary Clinton in the form of “thousands of emails.” The professor introduced him to a female Russian national who was supposedly Vladimir Putin’s niece (it turned out she wasn’t), and to someone who supposedly had connections in the Russian Ministry of Foreign Affairs (MFA). Based on those conversations, Papadopoulos pressed the campaign to set up meetings with the Russians, a suggestion that never came to fruition.

So what does this have to do with the larger case? I spoke this morning with Barbara McQuade, a professor at the University of Michigan law school who is a former U.S. Attorney and has worked extensively in criminal and national security cases. I asked: If Papadopoulos was just some low-level nobody tossing around ideas that were rejected by the campaign’s higher-ups, why would Mueller offer him a plea deal that is contingent on his cooperation? Doesn’t that suggest that he has information that can be used to build a case against someone more important than him?

“I think it’s a fair conclusion to think that he has information that is valuable in the prosecution of others,” McQuade says. “You would only offer that cooperation if you’ve sat down with him and learned that he has information that is of value.”

And that appears to be what is happening: in return for what will likely be a reduced sentence, Papadopoulos has agreed to sing.

Who does Papadopoulos have information on? We don’t know. The plea document mentions his discussions (his efforts to set up a meeting with the Russians) with people who are referred to as “Senior Policy Adviser,” “Campaign Supervisor,” and “High-Ranking Campaign Official,” but we don’t know who that is. Then there’s this:

“On or about May 4, 2016, the Russian MFA Connection sent an email (the ‘May 4 MFA Email’) to defendant PAPADOPOULOS and the Professor that stated: ‘I have just talked to my colleagues from the MFA. The[y] are open for cooperation. One of the options is to make a meeting for you at the North America Desk, if you are in Moscow.’ Defendant PAPADOPOULOS responded that he was ‘[g]lad the MFA is interested.’ Defendant PAPADOPOULOS forwarded the May 4 MFA Email to the High-Ranking Campaign Official, adding: ‘What do you think? Is this something we want to move forward with?’ The next day, on or about May 5, 2016, defendant PAPADOPOULOS had a phone call with the Campaign Supervisor, and then forwarded the May 4 MFA Email to him, adding to the top of the email: ‘Russia updates.’ ”

This exchange happened not long before Paul Manafort, Donald Trump Jr., and Jared Kushner had their infamous meeting with representatives of the Russian government who purportedly had damaging information on Clinton to offer. Given that context, it seems rather unlikely that Papadopoulos would not have mentioned the possibility that the Russians had of “dirt” on Clinton contained in “thousands of emails.” But we don’t yet know for sure.

| Courtesy Spike Paul Waldman, op-ed mug.