Former FBI agent Peter Strzok revealed in a new book that federal investigators believed it was 'conceivable, if unlikely' that President Trump was controlled by Russia after taking the Oval Office.
Speculation that the November 2016 election faced interference from Russia, under the order of President Vladimir Putin, launched investigations that resulted in a Republican-led upheaval of the federal agency.
Then-FBI director James Comey was ousted, accusations surfaced that the agency was used as pawn in a 'witch hunt' and a series of disparaging text messages linked to Strzok were used as political ammo on the national stage.
Those text messages were exchanged with former FBI attorney Lisa Page, who along with Strozk, was fired as news swirled of their secret affair.
But in his new book, 'Compromised: Counterintelligence and the Threat of Donald J. Trump,' Strzok attempted to set the record straight despite leaving out some pertinent details - including his relationship with Page.
In his new book, former FBI agent Peter Strzok (left) revealed that investigators believed it as 'conceivable' that President Trump (right) was controlled by Russia after the 2016 November election
Although Strzok's book shared details about his investigations into Russian interference, it does not address his affair with Lisa Page (pictured), which included a number of controversial text messages
In 'Compromised,' Strzok described how the FBI was forced to consider 'whether the man about to be inaugurated was willing to place his or Russia's interests above those of American citizens,' and how agents could go about investigating that.
Strzok opened the 2016 investigation into potential coordination between the Trump campaign and the Kremlin, and later took part in investigating the president himself in 2017.
'We certainly had evidence that this was the case: that Trump, while gleefully wreaking havoc on America's political institutions and norms, was pulling his punches when it came to our historic adversary, Russia,' wrote Strzok, according to The Washington Post.
Pictured: 'Compromised: Counterintelligence and the Threat of Donald J. Trump' by Peter Strzok
'Given what we knew or had cause to suspect about Trump's compromising behavior in the weeks, months, and years leading up to the election, moreover, it also seemed conceivable, if unlikely, that Moscow had indeed pulled off the most stunning intelligence achievement in human history: secretly controlling the president of the United States — a Manchurian candidate elected.'
In a separate interview with The Atlantic published Friday, he further explained what he believed the relationship may have been.
'I don't think that Trump, when he meets with Putin, receives a task list for the next quarter,' he told the publication.
'But I do think the president is compromised, that he is unable to put the interests of our nation first, that he acts from hidden motives, because there is leverage over him, held specifically by the Russians but potentially others as well.'
Strzok, a seasoned counterintelligence agent, alleged that Trump appeared to compromise himself while lying about his business dealings with Russia or Russian officials.
'Trump's apparent lies — public, sustained, refutable, and damaging if exposed — are an intelligence officer's dream,' Strzok wrote.
'For that very reason, they are also a counterintelligence officer's nightmare.'
Those concerns deepened after Trump fired Comey as FBI director and bragged to a Russian diplomat that 'great pressure' was removed.
That interaction was like a 'five-alarm fire,' Strzok says, and the FBI began investigating whether Trump himself was under Russia's sway.
'I hadn't wanted to investigate the president of the United States,' Strzok wrote
'But my conviction on that point had been eroded by Trump's continued suspicious behavior with the Russians and his ongoing attacks on our investigation.'
Peter Strzok (left): 'Trump's apparent lies — public, sustained, refutable, and damaging if exposed — are an intelligence officer's dream. For that very reason, they are also a counterintelligence officer's nightmare'
Strzok was also instrumental in the investigation into Hilary Clinton and sensitive emails she sent using a private server while working as secretary for the Obama administration.
He maintained that the investigation into Clinton was far less serious then the probe into Trump, WaPo reports.
Although the use of a private email server launched the Clinton investigation, Strzok argued that had her emails been kept within the State Department system, 'it would have been less secure and probably much more vulnerable to hacking.'
Strzok wrote that Russia reportedly had additional, possibly damaging information about Clinton that it did not release. He suggests that the additional information could have been saved for if she was elected.
'We also knew through classified channels that the Russians had material with the potential to be greatly disruptive, yet they had chosen not to release it,' Strzok wrote.
'Were they waiting for Election Day? Were they holding it in reserve to discredit Clinton?'
The specific details of the information are still classified.
Pictured: Donald Trump (left) and Vladimir Putin (right) at the Presidential Palace in Helsinki during a press conference Helsinki Summit, Finland, on July 16, 2018
Strzok argued that the decision by James Comey (pictured) to reveal the FBI had reopened a probe into Hilary Clinton's email two weeks before the election swayed voters
He added that he believed some decisions from Comey, including his recommendation that Clinton not be charged just months before the