President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE's former campaign manager said on Sunday that ousted White House chief strategist Stephen Bannon would still be effective at pushing his agenda from outside the White House and will "hold people accountable" through his role at Breitbart News.

In an interview with "Fox & Friends," Corey Lewandowski responded to Bannon's prediction in the Washington Post that Republican leaders in Congress wouldn't fall in line to pass the rest of Trump's agenda.

"Congress has been broken, and the American people chose Donald Trump to come to Washington to do things differently," Lewandowski said. "If those elected officials in Congress and the U.S. Senate can't get on the Trump agenda, then there's accountability at the ballot box."

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Lewandowski added that Bannon could possibly be more effective in the private sector than he ever was in the White House.

"Holding people accountable from the outside is considerably easier than holding someone accountable from the inside," Lewandowski told Fox. "Look, I've always been an outside individual, I've never been in the administration, and I can hold people accountable on the outside in different way than I could if I were in the administration."

"I think the same is going to be true of Steve Bannon," he added. "That gives him some more freedom to hold those individuals accountable on the Trump agenda."

The former campaign manager hinted that retribution could come at election time for Republicans who didn't fall in line behind Trump.

"That's very important, because a number of those individuals who are not on the Trump agenda are gonna be up for reelection next year, and there should be accountability at the ballot box," he said.

Bannon left the White House on Friday after weeks of speculation about his job security in the administration. Hours later, he resumed his old position at Breitbart News, chairing Friday's evening editorial meeting.

“The populist-nationalist movement got a lot stronger today,” said Breitbart News Editor-in-Chief Alex Marlow on Friday. “Breitbart gained an executive chairman with his finger on the pulse of the Trump agenda."