Watch: Clinton's campaign manager says Trump's win helped by Russia pushing fake news

Discussing the 2016 election with the campaign managers of President-elect Trump and failed Democratic candidate Hillary Clinton, Kellyanne Conway and Robby Mook sat down with CNN's Jake Tapper on Friday.

During the discussion, Tapper brought up the current concern about "fake news," and asked how big a problem it was in — as Mook called it — "this post-factual election."

Mook went first, stating that it was a "huge problem," then launched into how we should look into Russia pushed much of it.

"There's a lot of things we need to examine coming out of this," said Mook. "Congress has got to investigate what happened with Russia here. We cannot have foreign, and foreign aggressors — I would argue — intervening in our elections. We know the Russians were promulgating fake news through Facebook and other outlets."

He went on to talk about now Trump's Chief of Staff Steve Bannon, and how his site Breitbart "peddled a lot of stories on that website that were just false."

When Conway was asked the same, she responded that the biggest piece of fake news floating around was that "Donald Trump wouldn't win."

She also pointed out that Trump came out on top because voters figured out that “there’s a difference between what may offend me and what absolutely affects me.”

Watch below: