And after Trump's surprise decision was made public at a White House briefing, Brennan quickly hit back, accusing the president of trying to curb free speech in a "politically motivated" action that he said should "gravely worry all Americans". She also cited Brennan's "wild outbursts" online and on TV.
Sanders says other former intelligence officials' security clearances are also "currently under review". But the tweets and statements made on MSNBC were not just critical in nature but in some cases accused Trump of treason and alluded to unverified rumors that Russian Federation was blackmailing Trump.
And yet no one but no one believes that Brennan would have lost his clearance if he'd had "GREAT things" to say about Trump, those failings notwithstanding.
In recent days, Brennan has issued regular defenses of former White House staff Omarosa, who secretly recorded Chief of Staff John Kelly in the Situation Room.
"And I think people ought to think seriously about that", Clapper insisted.
The president also said Brennan "has recently leveraged his status as a former high ranking official with access to highly sensitive information to make a series of unfounded and outrageous allegations" about the Trump administration.
This list of names included James Comey, James Clapper, Susan Rice, Michael Hayden and Peter Strzok.
Some suggested Trump might have grander, and more nefarious ambitions: he could be testing the waters on stripping Mueller of his security clearance.
John Sipher, who spent almost three decades in the CIA's clandestine service, called on CIA Director Gina Haspel and Director of National Intelligence Dan Coats to address the situation.More news: Steel Serpent Shows His Power in Final IRON FIST Season 2 Trailer
Mr Trump told the Wall Street Journal that "these people" - including Mr Brennan - had "led" the Russian Federation inquiry.
Trump's comments are reminiscent of when he claimed he was firing Comey over mishandling the Clinton probe, then admitted in a TV interview days later that he was thinking "this Russian Federation thing with Trump and Russian Federation is a made-up story".
"This has zero to do with national security".
Meanwhile, Benjamin Wittes of Lawfare said Comey told him he doesn't even have a security clearance to revoke and that he was "read out" when he left the government, which he said is normal practice.
Paul told reporters this week that Russian officials refused to acknowledge interfering in the 2016 presidential campaign and he said the US should stop expecting the country to confess.
Security clearances, their issuance, revocations, and standards regarding same, are exclusively Executive functions, allowing President Trump to act unilaterally on them.
Sanders first indicated that Trump was considering revoking the officials' clearances in July, drawing criticism from some lawmakers in his own party.
Peter Strzok, a former Federal Bureau of Investigation agent.
Former high-ranking security and intelligence officials typically retain their clearance in order to assist those still working for the government.