Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's campaign manager in an interview aired Sunday downplayed the role of fake news in the election, though Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE's top aide cited its spread as part of the reason for her stunning loss.

ADVERTISEMENT

Clinton campaign manager Robby Mook blamed the "post-factual" nature of the election as a factor in Clinton's loss, specifically mentioning Breitbart News, which was founded by Steve Bannon, the CEO of Trump's campaign.

"The Russians were propagating fake news through Facebook and other outlets," Mook added in a joint interview with Trump campaign manager Kellyanne Conway on CNN.

"But look, we also had, and this is with all due respect to Kellyanne and her colleagues, look, Steve Bannon ran Breitbart News, which was notorious for peddling stories like this."

Conway hit back, saying: "I think the biggest piece of fake news in the election was that Donald Trump couldn't win."