Trump has taunted McCabe both publicly and privately, and Republican allies have cast him as the center of a "deep state" effort to undermine the Trump presidency.
On Friday, Attorney General Jeff Sessionsannounced he fired McCabe largely because of Justice Department Inspector General Michael E. Horowitz's report.
The bureau's Office of Professional Responsibility recommended McCabe be fired.
Trump renewed some of those complaints on Saturday, writing in a tweet, "The Fake News is beside themselves that McCabe was caught, called out and fired".
The memos could bolster the account of Mr. Comey, whose own memos and testimony describe repeated requests by Mr. Trump to clear his name.
Comey's firing paved the way for Deputy Attorney General Rod Rosenstein to tap Special Counsel Robert Mueller, who is now leading the investigation into possible collusion between Trump's campaign and Russian Federation.
'Their persistence in this campaign only highlights the importance of the special counsel's work'.
CNN anchor Fredricka Whitfield explored the media commotion over controversial comments by President Donald Trump's lawyer, John Dowd, about ending special counsel Robert Mueller's investigation.
"Just end it on the merits in light of recent revelations", he said.
Mr. McCabe is known to have had at least three meetings with the president. "Because he said that he had authority to do this and he conferred with the director-the director at the time was James Comey".
The move will likely cost McCabe significant retirement benefits, because he could not retire Sunday, when he turns 50. Comey wrote on Twitter just minutes after the Trump's tweet, "Mr. President, the American people will hear my story very soon".
The firing arises from an inspector general review into how the FBI handled the Clinton email investigation. He said, "Even his statement is going to trigger another round of inquiries as to who actually knew about this and was this a leak to the media?" The unpublished report allegedly says McCabe authorized an FBI spokesman and lawyer to talk to the media about an investigation into the Clinton Foundation. He stepped down earlier this year from the deputy director role after FBI Director Christopher Wray was briefed on the inspector general's findings, though he technically was still an employee.
"I strongly believe this is the latest chapter in a yearlong attack on my credibility and service to the country", McCabe said. Her campaign received almost $700,000 in donations from the super PAC of former Democratic National Committee Chairman Terry McAuliffe, a longtime Clinton friend, as well as from the Democratic Party of Virginia.
By not letting him run out the clock on his career, Sessions may force McCabe to forgo some of his pension, which he had earned after 21 years at the bureau. In each, he asked about Mr. McCabe's wife, Jill, who ran a failed campaign as a Democrat for the Virginia State Senate.
He quickly found himself at odds with the Trump administration.
But Mr McCabe, who played a crucial role in the bureau's investigations of Hillary Clinton and Russia's interference in the 2016 USA presidential election, denied those claims and said he was facing retaliation by the Trump administration.
"Here is the reality: "I am being singled out and treated this way because of the role I played, the actions I took, and the events I witnessed in the aftermath of the firing of James Comey".