Fox's Bartiromo: DOJ, FBI, IRS, CIA 'were all involved in trying to take down Donald Trump'

Fox Business Network host Maria Bartiromo said Monday that then-President Obama "politicized all of his agencies" in an effort "to take down Donald TrumpDonald John TrumpTrump defends Stephanopolous interview Trump defends Stephanopolous interview Buttigieg on offers of foreign intel: 'Just call the FBI' MORE."

"President Obama, basically, it appears to me, politicized all of his agencies: the [Department of Justice] DOJ, the FBI, the IRS, the CIA," Bartiromo said on her Fox Business program, "Mornings with Maria." 

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"They were all involved in trying to take down Donald Trump," she added.

She made the comments to Fox senior judicial analyst Andrew Napolitano, who responded by referring to a tweet sent by former CIA Director John BrennanJohn Owen Brennan'Fox & Friends' co-host Kilmeade: Trump needs to 'clarify' comments on accepting foreign campaign intelligence Brennan slams Trump after ABC interview: Unfit to be president a 'gross understatement' Brennan slams Trump after ABC interview: Unfit to be president a 'gross understatement' MORE

Brennan, now an NBC News and MSNBC contributor, on Sunday responded to an earlier Trump tweet demanding a DOJ investigation into whether or not "the FBI/DOJ infiltrated or surveilled the Trump Campaign for political purposes."

Brennan warned Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellElection security bills face GOP buzzsaw Election security bills face GOP buzzsaw Overnight Defense: Trump doubles down on claim Iran attacked tankers | Iran calls accusations 'alarming' | Top nuke official quietly left Pentagon | Pelosi vows Congress will block Saudi arms sale MORE (R-Ky.) and Speaker Paul RyanPaul Davis RyanIndiana GOP Rep. Brooks says she won't seek reelection Indiana GOP Rep. Brooks says she won't seek reelection Inside Biden's preparations for first debate MORE (R-Wis.) that they'll each "bear major responsibility for the harm done to our democracy" if they "continue to enable Mr. Trump's self-serving actions."

"One of the reasons, I think, that [former CIA Director] John Brennan’s tweet was so vicious in tone, was because he does not want this behavior exposed,” Napolitano said on Monday. “He probably was behind it — and in fairness to him, it went on long before he got there and will go on long after he is gone.”

Deputy Attorney General Rod RosensteinRod RosensteinGOP group urges Republicans to speak out on obstruction claims against Trump in new ad GOP group urges Republicans to speak out on obstruction claims against Trump in new ad Judiciary Democrats announce series of hearings on Mueller report MORE — who has been rumored for months to be on the president's chopping block — announced not long after Trump's tweet on Sunday that the Department of Justice Inspector General will launch an investigation into if politics were involved in the FBI investigation of Trump in 2016.