At a minimum, the Trump campaign was vulnerable to charges of violating election laws against receiving things of value from non-U.S. persons. Conceivably, the campaign could have found itself at risk as some kind of accessory to the Russian hacks— hacking being a very serious crime indeed. So it was crucially important to the Trump campaign that Stone keep silent and not implicate Trump in any way.

Which is what Stone did. Stone was accused of—and convicted of—lying to Congress about his role in the WikiLeaks matter. Since Stone himself would have been in no legal jeopardy had he told the truth, the strong inference is that he lied to protect somebody else. Just today, this very day, Stone told the journalist Howard Fineman why he lied and who he was protecting. “He knows I was under enormous pressure to turn on him. It would have eased my situation considerably. But I didn’t.” You read that, and you blink. As the prominent Trump critic George Conway tweeted: “I mean, even Tony Soprano would have used only a pay phone or burner phone to say something like this.” Stone said it on the record to one of the best-known reporters in Washington. In so many words, he seemed to imply: I could have hurt the president if I rolled over on him. I kept my mouth shut. He owes me.

And sure enough, Trump did owe him. Trump commuted Stone’s 40-month sentence. Roger Stone will not go to prison for acting as an information conduit between Russian intelligence and the Trump campaign.