Christopher Krebs, the nation’s former top cybersecurity official, said in an interview broadcast late Monday that President Trump is a “big part of the disinformation” around the presidential election, saying that democracy is “under attack from the inside.”

“Certainly the president is a big part of the disinformation that is coming out there about the rigged election, but there are absolutely others,” Krebs, the former director of the Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency, told “Axios on HBO.”

Krebs, who was fired by Trump last month after pushing back against the president’s concerns around election fraud and vote interference, also argued that continued attacks on the validity of the election could undermine democracy.

“We all just for some reason think that democracy is resilient and can withstand this sort of attack,” he said. “I actually think democracy is quite fragile, and when the institutions themselves are under attack from the inside … that’s pretty close to an existential issue, and so we need the other parts of the three-part government to actively push back and actively engage.”