The Cambridge Analytica whistleblower who insists Facebook data was inappropriately used to aid the Trump campaign in the 2016 presidential election said on Sunday he will cooperate with the Department of Justice.

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Christopher Wylie told NBC's Chuck Todd on "Meet the Press" that he plans on meeting with “law enforcement and the Department of Justice.”

"I plan to be [cooperating]. We're just setting out dates that I can actually go and sit down," Wylie said.

His comments come as special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE leads an investigation into Russian meddling in the 2016 presidential election.

Wylie said on Sunday that the firm gathered information from over 87 million users and that the data could be in Russia.

"It could be stored in various parts of the world, including Russia, given the fact that the professor who was managing the data harvesting process was going back and forth between the U.K. and to Russia," Wylie said.

"I know that Facebook is now starting to take steps to rectify that and start to find out who had access to it and where it could have gone, but ultimately it's not watertight to say that, you know, we can ensure that all the data is gone forever," he continued.

Prior estimates said that Cambridge Analytica had harvested data from about 50 million Facebook users, of which less than 250,000 had given permission for their data to be harvested.

Wylie's comments come before Facebook founder and CEO Mark Zuckerberg Mark Elliot Zuckerberg2.5 million US users register to vote using Facebook, Instagram, Messenger Hillicon Valley: Trump's ban on TikTok, WeChat in spotlight | NASA targeted by foreign hackers | Instagram accused of spying in lawsuit The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks MORE testifies in front of a congressional panel about his company's handling of the data.