Following former Obama administration CIA Director John Brennan on Twitter, we see his animus nakedly on display. He is demented by hatred. Is this really the public role a former Director of the CIA is to be playing? Below is his most recent effusion on Twitter.

Donald Trump’s press conference performance in Helsinki rises to & exceeds the threshold of “high crimes & misdemeanors.” It was nothing short of treasonous. Not only were Trump’s comments imbecilic, he is wholly in the pocket of Putin. Republican Patriots: Where are you???

It is easy to forget the critical role played by Brennan in the still mysterious origin of the counterintelligence investigation that culminated in the appointment of Robert Mueller as Special Counsel. Kim Strassel focuses on Brennan in her weekly Wall Street Journal column today. She reviews the record to date:

[T]he record shows he went on to use his position—as head of the most powerful spy agency in the world—to assist Hillary Clinton’s campaign (and keep his job).

Mr. Brennan has taken credit for launching the Trump investigation. At a House Intelligence Committee hearing in May 2017, he explained that he became “aware of intelligence and information about contacts between Russian officials and U.S. persons.” The CIA can’t investigate U.S. citizens, but he made sure that “every information and bit of intelligence” was “shared with the bureau,” meaning the FBI. This information, he said, “served as the basis for the FBI investigation.” My sources suggest Mr. Brennan was overstating his initial role, but either way, by his own testimony, he as an Obama-Clinton partisan was pushing information to the FBI and pressuring it to act.

More notable, Mr. Brennan then took the lead on shaping the narrative that Russia was interfering in the election specifically to help Mr. Trump—which quickly evolved into the Trump-collusion narrative. Team Clinton was eager to make the claim, especially in light of the Democratic National Committee server hack. Numerous reports show Mr. Brennan aggressively pushing the same line internally. Their problem was that as of July 2016 even then-Director of National Intelligence James Clapper didn’t buy it. He publicly refused to say who was responsible for the hack, or ascribe motivation. Mr. Brennan also couldn’t get the FBI to sign on to the view; the bureau continued to believe Russian cyberattacks were aimed at disrupting the U.S. political system generally, not aiding Mr. Trump.

The CIA director couldn’t himself go public with his Clinton spin—he lacked the support of the intelligence community and had to be careful not to be seen interfering in U.S. politics. So what to do? He called Harry Reid. In a late August briefing, he told the Senate minority leader that Russia was trying to help Mr. Trump win the election, and that Trump advisers might be colluding with Russia. (Two years later, no public evidence has emerged to support such a claim.)

But the truth was irrelevant. On cue, within a few days of the briefing, Mr. Reid wrote a letter to Mr. Comey, which of course immediately became public. “The evidence of a direct connection between the Russian government and Donald Trump’s presidential campaign continues to mount,” wrote Mr. Reid, going on to float Team Clinton’s Russians-are-helping-Trump theory. Mr. Reid publicly divulged at least one of the allegations contained in the infamous Steele dossier, insisting that the FBI use “every resource available to investigate this matter.”

The Reid letter marked the first official blast of the Brennan-Clinton collusion narrative into the open. Clinton opposition-research firm Fusion GPS followed up by briefing its media allies about the dossier it had dropped off at the FBI. On Sept. 23, Yahoo News’s Michael Isikoff ran the headline: “U.S. intel officials probe ties between Trump adviser and Kremlin.” Voilà. Not only was the collusion narrative out there, but so was evidence that the FBI was investigating.

In their recent book “Russian Roulette,” Mr. Isikoff and David Corn say even Mr. Reid believed Mr. Brennan had an “ulterior motive” with the briefing, and “concluded the CIA chief believed the public needed to know about the Russia operation, including the information about the possible links to the Trump campaign.” (Brennan allies have denied his aim was to leak damaging information.)

Clinton supporters have a plausible case that Mr. Comey’s late-October announcement that the FBI had reopened its investigation into the candidate affected the election. But Trump supporters have a claim that the public outing of the collusion narrative and FBI investigation took a toll on their candidate. Politics was at the center of that outing, and Mr. Brennan was a ringmaster. Remember that when reading his next “treason” tweet.