The White House on Tuesday reiterated President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's intention to look into revoking security clearances for a number of former intelligence officials who have been critical of the Trump administration, but offered no specifics on the process.

White House spokesman Hogan Gidley told reporters on Air Force One that the president has "begun the mechanism" to remove security clearances from former CIA Director John Brennan John Owen BrennanJournalism or partisanship? The media's mistakes of 2016 continue in 2020 Comey on Clinton tweet: 'I regret only being involved in the 2016 election' Ex-CIA Director Brennan questioned for 8 hours in Durham review of Russia probe MORE, former Director of National Intelligence James Clapper James Robert ClapperOn China, Biden is no Nixon — and no Trump The Hill's 12:30 Report - Speculation over Biden's running mate announcement Trump slams former intelligence officials to explain 'reluctance to embrace' agencies MORE and several other ex-officials who mainly served in the Obama administration.

However, the timetable and process for doing so remains unclear.

"I can't get into specifics about the mechanism," Gidley said.

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"What I can say is that the president finds it extremely inappropriate for somebody to go on television under the perception of legitimacy, integrity and level false and baseless claims against another person without any evidence whatsoever," he continued. "He finds that to be somewhat troublesome and concerning and so he has begun the mechanism to remove security clearances from certain individuals."

Gidley later clarified to The Associated Press that he meant the mechanism is “being looked at" and had not yet been put into place.

White House press secretary Sarah Huckabee Sanders said in a statement to The Hill that nothing has changed since Monday, when she initially told reporters that Trump is considering taking away security clearances for Brennan, Clapper, former CIA Director Michael Hayden, former national security adviser Susan Rice, former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE and former Deputy FBI Director Andrew McCabe Andrew George McCabeGraham: Comey to testify about FBI's Russia probe, Mueller declined invitation Barr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' GOP votes to authorize subpoenas, depositions in Obama-era probe MORE.

"He has begun looking at it," Sanders said Tuesday.

The remarks came after Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.) on Tuesday downplayed the idea that the administration would revoke the security clearances, a prospect that has prompted questions about officials attempting to quiet critics.

Ryan said he believes Trump is just "trolling people" with the concept.

“That’s something that the executive branch deals with," Ryan said. "That’s not really in our purview."

On Monday, Sanders said Trump is bothered that the former officials are "politicizing agencies and departments that are specifically meant to not be political."

“Making baseless accusations of improper contact with Russia, or being influenced by Russia, against the president is extremely inappropriate and the fact that people with security clearances are making these baseless charges provides inappropriate legitimacy to accusations with zero evidence," Sanders said.

Neither McCabe nor Comey reportedly still has a valid security clearance, but all of the individuals named have been outspoken critics of Trump.

The idea of revoking clearances was first raised by Sen. Rand Paul Randal (Rand) Howard PaulRand Paul says he can't judge 'guilt or innocence' in Breonna Taylor case Overnight Health Care: Health officials tell public to trust in science | Despair at CDC under Trump influence | A new vaccine phase 3 trial starts Health officials tell public to trust in science MORE (R-Ky.), who met with Trump on Monday and questioned whether Brennan was "monetizing his security clearance."

While most of the officials Sanders named have not yet responded to being targeted by Trump, Clapper called it a "very petty thing to do" and noted that his criticisms of the president are not dependent upon having a security clearance.

Updated at 7:06 p.m.