Former White House national security aide Sebastian Gorka predicted President Trump will fire several high-ranking White House officials by Christmas and blamed the recent changes in personnel not on the president, but rather those below him.

"I predict a lot of changes … almost all the changes in personnel, the significant changes, were not made by the president, they were made by people below him," Gorka told NBC News on Monday. "I predict that soon, perhaps before Christmas, the president will be removing high-ranking individuals from inside his administration because he will realize who he's surrounded with."

Gorka left his post at the White House last month, but the nature of his departure has been disputed. The former national security aide said he resigned, in part because others within the White House didn't support Trump's "Make America Great Again" agenda.

But a White House official rejected Gorka's claim, implying instead he was fired.

Gorka's departure came just one week after former White House chief strategist Steve Bannon "mutually agreed" with White House chief of staff John Kelly to leave his position.

Both Gorka and Bannon returned to Breitbart News and said they believe they can have more influence on the president's agenda from outside the administration.

"The people most clearly associated with the president's victory, with what we call the ‘Make America Great Again Agenda,' were slowly being isolated, were sometimes being fired or pushed out of policy roles," Gorka said. "We decided that we could best support the president outside as private citizens."

As an example of the sway Gorka said he believes he will continue to have, the former national security aide pointed to Corey Lewandowski, who served as former campaign manager for the Trump campaign.

"I'd walk into the office and find Corey talking to the president, regularly," Gorka said.

"You don't have to pick up a government paycheck to be in discussion with the president or helping him," he continued. "And one thing about the president, if you're loyal to him, he's loyal to you."

Since Trump took office in January, several top officials have left the White House, including former White House chief of staff Reince Priebus, former White House press secretary Sean Spicer, and former White House communications director Anthony Scaramucci.