A few hours before FBI Director James Comey was scheduled to appear before a House committee about probes into Russia, President Donald Trump slammed coverage of his campaign’s ties to Russian officials as “FAKE NEWS” in a series of tweets.

James Clapper and others stated that there is no evidence Potus colluded with Russia. This story is FAKE NEWS and everyone knows it! — Donald J. Trump (@realDonaldTrump) March 20, 2017

The Democrats made up and pushed the Russian story as an excuse for running a terrible campaign. Big advantage in Electoral College & lost! — Donald J. Trump (@realDonaldTrump) March 20, 2017

The real story that Congress, the FBI and all others should be looking into is the leaking of Classified information. Must find leaker now! — Donald J. Trump (@realDonaldTrump) March 20, 2017

House Intelligence Committee Chair Devin Nunes (R-CA) said on Sunday that he has not seen any evidence that Trump’s campaign colluded with Russia. The ranking member of the committee, Rep. Adam Schiff (D-CA), did not rule out the possibility of collusion.

“I would characterize it this way, at the outset of the investigation. There is circumstantial evidence of collusion. There is direct evidence, I think, of deception,” Schiff said on Sunday. “And that’s where we begin the investigation.”