Former White House aide Sebastian Gorka warned Tuesday President Trump will likely shake up his administration in the coming months to fill it with individuals who are committed to his populist agenda.

"In the next few months, we should see some very significant changes in personnel of the highest levels of the administration – not because a Cabinet member decides to do it or the chief of staff, but because the president decides to," Gorka said during remarks at Hillsdale College's annual Constitution Day Celebration.

The ousted national security aide left the White House last month after facing pressure to resign from chief of staff John Kelly. He announced Tuesday he had signed on as chief strategist to the "MAGA Coalition," a pro-Trump group that aims to back political candidates who will "compete against globalist corporatists interests."

Gorka's departure from the White House came on the heels of a high-profile exit by Steve Bannon, who returned to the helm of Breitbart News after leaving his post as Trump's chief strategist.

"For the last seven months, most of the firings have had nothing to do with the president," Gorka, who maintains he resigned, said Tuesday. "In the next few months, I predict they will."

Gorka was highly critical of his former colleagues in the resignation letter he circulated to reporters following his ouster. He repeated several points of criticism on Tuesday, including his claim that establishment figures – or "the swamp," as he put it – are in ascendance inside the West Wing.

"Lots of people got suicidal when my boss, Steve Bannon, resigned," Gorka said. "And then they got really suicidal when I resigned."

"But it's OK," he continued. "Bringing us back to the foundings of this country is not a function of where Steve sits or whether I have a window in the Eisenhower building."

Rather, Gorka said he and Trump's allies on the outside are "in this for the long game" and remain committed to advancing his agenda even if current administration officials continue to stand in the way.

"It is very important to remember that this is a temporary state of affairs," Gorka said.