Facebook CEO Mark Zuckerberg expressed regret at previously thinking that claims misinformation on his platform changed the election were “crazy.”

“After the election, I made a comment that I thought the idea misinformation on Facebook changed the outcome of the election was a crazy idea. Calling that crazy was dismissive and I regret it,” declared Zuckerberg in a post. “This is too important an issue to be dismissive.”

This change of heart comes shortly after Zuckerberg had a meeting with former President Obama who advised Zuckerberg on the subject of fake news.

As previously reported, “Russia has come under fire from the Democratic establishment recently who claim Russian adverts on Facebook may have influenced the 2016 presidential election.”

This month, it was reported that FBI Special Counsel Robert Mueller is “now in possession of Russian-linked ads run on Facebook during the presidential election.” Facebook handed over the adverts along with detailed information about the accounts behind the adverts in response to a search warrant.

Russia has since threatened to ban Facebook, citing a “local data storage” law introduced in 2015 that the company had allegedly violated.