The Senate Intelligence Committee is preparing to question top Obama administration intelligence officials behind closed doors on Wednesday on their explosive assessment that officially accused Russia of meddling in the 2016 presidential election to boost then-candidate Donald Trump.

The committee, led by Chairman Richard Burr, R-N.C., and Vice Chairman Mark Warner, D-Va., invited former Director of National Intelligence James Clapper, former Central Intelligence Agency Director John Brennan, former National Security Agenda Director Michael Rogers (who retired earlier this year) and former FBI Director James Comey.

DOCUMENTS SUGGEST POSSIBLE COORDINATION BETWEEN CIA, FBI, OBAMA WH AND DEM OFFICIALS EARLY IN TRUMP-RUSSIA PROBE: INVESTIGATORS

Sperry: House Intelligence Committee Chairman Devin Nunes next plans to investigate the role former CIA Director John Brennan and other Obama intelligence officials played in promoting the salacious and unverified Steele dossier on Donald Trump — including whether Brennan perjured himself in public testimony about it.

In his May 2017 testimony before the intelligence panel, Brennan emphatically denied the dossier factored into the intelligence community’s publicly released conclusion last year that Russia meddled in the 2016 election “to help Trump’s chances of victory.”

Brennan also swore that he did not know who commissioned the anti-Trump research document (excerpt here), even though senior national security and counterintelligence officials at the Justice Department and FBI knew the previous year that the dossier was funded by the Hillary Clinton campaign.

Last week, Nunes (R-Calif.) released a declassified memo exposing surveillance “abuses” by the Obama DOJ and FBI in their investigation of Trump’s ties to Russia. It said the agencies relied heavily on the uncorroborated dossier to take out a warrant to secretly surveil a Trump adviser in the heat of the 2016 presidential election, even though they were aware the underlying “intelligence” supporting the wiretap order was political opposition research funded by Clinton allies — a material fact they concealed from FISA court judges in four separate applications.

Nunes plans to soon release a separate report detailing the Obama State Department’s role in creating and disseminating the dossier — which has emerged as the foundation of the Obama administration’s Russia “collusion” investigation. Among other things, the report will identify Obama-appointed diplomats who worked with partisan operatives close to Hillary Clinton to help ex-British spy Christopher Steele compile the dossier, sources say.

“Those are the first two phases” of Nunes’ multipart inquiry, a senior investigator said. “In phase three, the involvement of the intelligence community will come into sharper focus.”

The aide, who spoke only on condition of anonymity, said Nunes will focus on Brennan as well as President Obama’s first CIA director, Leon Panetta, along with the former president’s intelligence czar, James Clapper, and national security adviser, Susan Rice, and security adviser-turned U.N. ambassador Samantha Power, among other intelligence officials.

“John Brennan did more than anyone to promulgate the dirty dossier,” the investigator said. “He politicized and effectively weaponized what was false intelligence against Trump.”

Attempts to reach Brennan for comment were unsuccessful.

Several Capitol Hill sources say Brennan, a fiercely loyal Obama appointee, talked up the dossier to Democratic leaders, as well as the press, during the campaign. They say he also fed allegations about Trump-Russia contacts directly to the FBI, while pressuring the bureau to conduct an investigation of several Trump campaign figures starting in the summer of 2016.

Trump campaign Chairman Paul Manafort was wiretapped in addition to Trump adviser Carter Page during the campaign. (Page has not been charged with a crime. Manafort was recently indicted for financial crimes unrelated to the Moscow “collusion” activities alleged in the dossier.)

On Aug. 25, 2016, for example, the CIA chief gave an unusual private briefing to then-Senate Minority Leader Harry Reid (D-Nev.) in which he told Reid the Russians were backing Trump and that the FBI would have to take the lead in an investigation because the FBI is the federal agency in charge of domestic intelligence and, unlike the CIA, can spy on U.S. citizens.

Two days after Brennan’s special briefing, Reid fired off a letter to then-FBI Director James Comey demanding he open an investigation targeting “individuals tied to Trump” to determine if they coordinated with the Russian government “to influence our election.”

“The Trump campaign has employed a number of individuals with significant and disturbing ties to Russia and the Kremlin,” the then-top Democrat in the Senate added in his two-page letter.

Reid then alluded to Page as one of those compromised individuals and repeated an unproven charge from the dossier that Page had met with two Kremlin officials in Moscow in July 2016 to discuss removing U.S. sanctions on Russia. Page has repeatedly denied the allegation under oath, swearing he never even met the Russian officials named in the dossier.

“Any such meetings should be investigated,” Reid asserted.

Less than two months later, Comey signed an application for a surveillance warrant to monitor Page’s emails, text messages, phone conversations and residence.

Unsatisfied with the progress of Comey’s investigation, Reid released an open letter to the FBI chief in late October 2016 accusing him of sitting on evidence. Reid told Comey that from his communications with “other top officials in the national security community, it has become clear that you possess explosive information about close ties and coordination between Donald Trump, his top advisers and the Russian government — a foreign interest openly hostile to the United States, which Trump praises at every opportunity.”

Congressional investigators say that the “explosive information” Reid referred to was the false or unverified claims in the Clinton-funded dossier — which the sources say were passed along by Brennan. They add that Brennan gave more than one briefing.

After Trump won the election, sources say, the CIA director sought to “weaponize” the dossier’s wild accusations against the president-elect.

In early January, just weeks before Trump was inaugurated, investigators say Brennan saw to it that the contents from the dossier were attached to an official daily intelligence briefing for Obama. The special classified briefing was then leaked to the major Washington media, allowing them to use the presidential briefing to justify the publication of claims they had up to that point not been able to substantiate and had been reluctant to run.

CNN broke the news that the dossier — described as “classified documents” — had been attached to the briefing report by the CIA, and had been given to the president. The top-level credence that the government was placing in the dossier gave prominent newspapers, including the Washington Post and New York Times, justification to follow suit.

In addition, BuzzFeed published 35 pages of the dossier in full. (The Internet news outlet was recently sued by Trump campaign lawyer Michael Cohen, whom the dossier accused of conspiring with the Kremlin to pay Russian hackers to steal Clinton campaign emails. It’s one of several libel and defamation lawsuits tied to the dossier.)

At the time, the Washington Post was assured by Obama intelligence officials that “the sources involved in the [dossier’s] reporting were credible enough to warrant inclusion of their claims in the highly classified [presidential] report.” Months later in public testimony, however, Brennan said the dossier and its sources were not credible enough to incorporate the information in a separate January 2017 intelligence report on Russian election interference publicly released by the administration. The published unclassified version of the report nonetheless echoes the dossier’s central assertion that Moscow meddled in the election to help Trump.

Brennan later swore the dossier did not “in any way” factor into the CIA’s assessment that Russia interfered in the election to help Trump. However, congressional investigators suggest a still-classified version of the January 2017 intelligence report contradicts his claim. Also in his May 2017 testimony, Brennan swore he had no idea who commissioned the dossier.

CIA veterans say Brennan was the most politicized director in the agency’s history and was responsible for much of the anti-Trump bias from the intelligence community during the campaign and transition period.

Former CIA field operations officer Gene Coyle, a 30-year agency veteran who served under Brennan, said he was “known as the greatest sycophant in the history of the CIA, and a supporter of Hillary Clinton before the election.”

“I find it hard to put any real credence in anything that the man says,” he added.

Coyle noted that Brennan broke with his predecessors who stayed out of elections. Several weeks before the vote, he said, “Brennan made it very clear that he was a supporter of candidate Clinton, hoping he would be rewarded with being kept on in her administration.” (Brennan is a liberal Democrat. In fact, at the height of the Cold War in 1976, he voted for a Communist Party candidate for president.)

What’s more, his former deputy at the CIA, Mike Morell, who formed a consulting firm with longtime Clinton aide and campaign adviser Philippe Reines, even came out in early August 2016 and publicly endorsed her in the New York Times, while claiming Trump was an “unwitting agent” of Moscow.

“In the intelligence business, we would say that Mr. Putin had recruited Mr. Trump as an unwitting agent of the Russian Federation,” he claimed. “My training as an intelligence officer taught me to call it as I see it. This is what I did for the CIA. This is what I am doing now. Our nation will be much safer with Hillary Clinton as president.”

Reid repeated Morell’s allegation against Trump in his August 2016 letter to Comey.

Career U.S. intelligence officials say Morell, like Brennan, was personally invested in a Clinton victory.

Morell “had aspirations of being CIA director if she had won,” said former FBI counterintelligence official I.C. Smith, whose service overlapped with Brennan’s.

Investigators are trying to learn if the Clinton campaign shared, through Reines, the early memos on the dossier it was paying for with Morrell before he wrote his Times op-ed.

Morell could not be reached for comment. But he pushed back hard last week against Nunes releasing his memo exposing the FBI’s reliance on the dossier for Trump wiretaps, which he argued “did not have to happen. It undermines the credibility of the FBI in the public’s eyes, and with no justification in my view.”

“What happened here underscores the partisanship and the dysfunction of a very important committee in Congress, and that does not serve Congress well. It doesn’t serve the intelligence community, and it doesn’t serve the country well,” Morell continued earlier this week in an interview with CBS News, where he now works as a “senior national security contributor.”

Sources say Brennan is aware that the House Intelligence Committee is targeting him in its wide-ranging investigation of the dossier and investigative and intelligence abuses related to it, and that Nunes plans to call him and other former Obama administration officials before the panel to question them based on newly obtained documents and information.

Last week, perhaps not coincidentally, Brennan signed a contract with NBC News and MSNBC to be their “senior national security and intelligence analyst.”

On Sunday’s “Meet the Press,” Brennan laced into Nunes for releasing the memo revealing FBI surveillance abuses related to the dossier, claiming the head of the intelligence panel has “abused the office of the chairmanship.”

“It really underscores just how partisan Mr. Nunes has been,” Brennan charged.

In the interview, Brennan claimed he first learned of the existence of the dossier “in late summer of 2016, when there were some individuals from the various U.S. news outlets who asked me about my familiarity with it. And I had heard just snippets about it.”

He further contended that he had neither seen nor read the dossier until a month after the election.

“I did not know what was in there,” Brennan said. “I did not see it until later in that year, I think it was in December.”

Brennan also insisted he did not know who was pulling the strings on the research that went into the dossier.

“I was unaware of the provenance of it as well as what was in it,” he said, and he reasserted that “it did not play any role whatsoever in the intelligence community assessment that was done.”

Obama’s director of national intelligence, James Clapper, is also coming under scrutiny for his role in the dossier.

He joined Brennan in giving Obama a two-page summary of the dossier memos during the presidential briefing in January 2017. Days later, Clapper expressed “profound dismay at the leaks that have been appearing in the press,” and misleadingly referred to the dossier as a “private security company document.”

The intelligence committee plans to press Clapper to find out if he knew at the time that, in fact, the document was political opposition research underwritten by the Clinton campaign, and whether any of the leaks to the media came from his office.

“I do not believe the leaks came from within the IC [intelligence community],” he maintained at the time, adding that “we did not rely upon [the dossier] in any way for our conclusion” on Russian interference.

In October 2016, during the heat of the campaign, Clapper issued a public report declaring that Russian President Vladimir Putin’s regime directed the cyberattacks on Clinton campaign emails, echoing memos Steele was delivering at the time to the Clinton campaign.

A year later, after it was finally revealed in the national media that the Clinton campaign and the Democratic National Committee funded the research that went into the notorious dossier, Clapper insisted it “doesn’t matter who paid for it.”

“It’s what the dossier said and the extent to which it was — it’s corroborated or not. We had some concerns about it from the standpoint of its sourcing, which we couldn’t corroborate,” Clapper added last October in an interview with CNN.

He went on to strongly suggest that the intelligence assessment report he issued with Brennan, which concluded the Kremlin not only hacked the Democratic campaign but did so specifically to put Trump in the White House, was based on “some of the substantive content of the dossier.”

“But at the same time, some of the substantive content, not all of it, but some of the substantive content of the dossier, we were able to corroborate in our Intelligence Community Assessment from other sources, which we had very high confidence of,” Clapper said.

Investigators say Nunes intends to drill down on exactly who those “other sources” are now that his committee has learned that top officials at both the FBI and Justice Department relied on a Yahoo! News article as their additional sourcing to corroborate the dossier allegations they cited to obtain Trump campaign wiretap warrants — even though it turns out the main source for the Yahoo! story was merely the dossier’s author, Steele, who was disguised as “a Western intelligence source.”

Clapper, who recently signed his own media deal, joining CNN as a paid “contributor,” bashed Nunes on the network and suggested the release of future reports could endanger the intelligence community’s mission. He said his release of the FBI memo was “political” and an “egregious” betrayal of “others in the intelligence community who have a lot at stake here with the whole FISA [surveillance] process.”