"Today, in fulfilling that responsibility, I have made a decision to revoke the security clearance of John Brennan, former director of the Central Intelligence Agency", Trump said in a statement dictated in the White House briefing room by his press secretary Sarah Sanders.
The signees included seven former CIA directors, six former CIA deputy directors and two former national intelligence directors, James Clapper and retired Navy Adm. Denny Blair.
"All records of communications, including but not limited to letters, emails, text messages, and instant chats, between former CIA Director John Brennan and/or officials in the CIA Director's Office on the one hand, and Senator Harry Reid and/or members of Senator Reid's staff on the other hand, regarding, concerning or relating to the Christopher Steele "dossier" and/or alleged "collusion" between the Trump presidential campaign and Russian Federation".
McCraven told Trump that as president, he has been an embarrassment and humiliation, and called the revocation of security clearances of his critics an attempt to silence criticism.
"There's no silence. If anything, I'm giving them a bigger voice", Trump said.
The president said he does not trust "many of those people on that list" and does not think they are "good people".
In an opinion piece in The New York Times, Mr Brennan said Mr Trump's decision to deny him access to classified information was a desperate attempt to end Mueller's investigation.
In a statement released late on Thursday, officials who served under Republican and Democratic officials said they did not necessarily agree with Brennan's harsh criticism of the president but that security authorizations should be based on national security, not politics.
Trump has repeatedly targeted Ohr as a source for Mueller and his investigation.
Ohr works in the Justice Department's criminal division. And, while many intelligence officials-like former FBI Director James Comey, former FBI Special Agent Peter Strzok, and Department of Justice attorney Bruce Ohr-have all had some of their Trump-Russia communications exposed, thus far, Brennan has been spared.
"Let him write his report", Trump said.
Putin told reporters in Helsinki, while standing next to Trump, that he had wanted the former NY businessman to win the White House. "Beyond that, this action is quite clearly a signal to the former and current officials", the statement said.
Watch above, via Fox News.
Burr says if it is political conjecture, Trump has full authority to pull Brennan's clearance.