Veteran journalist Carl Bernstein said the high volume of Russia investigation-related stories in the past two years have been merited, no matter if special counsel Robert Mueller determined the Trump campaign colluded.

CNN’s “Reliable Sources” host Brian Stelter argued the volume of coverage fueled the belief that “something big is coming” in the investigation into Russian interference in the 2016 election.

“The volume of coverage is justified,” the veteran journalist of Watergate fame told CNN’s “Reliable Sources” host Brian Stelter.

Bernstein, best known for his investigative reporting that shed light on the Watergate scandal leading to former President Richard Nixon's resignation in 1974, has been at the forefront of reporting digging into the years-long Russia investigation. In January, Bernstein said he had been told that a draft of Mueller's final report shows Trump helped Putin "destabilize" the U.S.

Mueller concluded his investigation Friday, delivering his report to Attorney General William Barr. The investigation led to the indictments of 34 people and three Russian companies, including six individuals close to Trump, such as former Trump campaign chairman Paul Manafort, but none relate to collusion with Russia. Mueller is not expected to recommend any new indictments.

Barr is reviewing the report and may be able to brief members of Congress on Mueller’s “principal conclusions” sometime Sunday.

“This investigation and the conduct and behavior of this president is the biggest story we’ve had in many years, because his behavior and conduct is anomalous. It’s different than any other president in our history. He says and does things, including the lying, that no other president has done," Bernstein said.

Stelter also asked Bernstein whether the media will have failed for focusing so much on the investigation if it turns out there was “a lot of smoke but no fire.”

Berstein said the Mueller report, if released to the public, could shine a light on whether Trump has obstructed justice or has “wittingly, unwittingly, half wittingly done [Russian President Vladimir] Putin’s bidding.”

“First of all, I think there has been plenty of fire regardless of whether or not there's a finding, of whether or not Donald Trump is guilty of a crime,” he said. “Remember, under the Justice Department guidelines, he cannot be found guilty of a crime while in office or indicted.”