Veteran reporter Carl Bernstein on Sunday said 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's recent indictment of 12 Russian intelligence officials proves his probe is "not a witch hunt."

"Indeed, the president’s object has been throughout to make this appear as a witch hunt," Bernstein said on CNN's "Reliable Sources."

"It is now demonstrable to all, for all to see, this is not a witch hunt," Bernstein continued.

"It is now demonstrable for all to see this is not a witch hunt": Carl Bernstein discusses the Russia probe ahead of the Trump-Putin summit https://t.co/HHboOfqFGp pic.twitter.com/mEwnesAdiw — Reliable Sources (@ReliableSources) July 15, 2018

Bernstein's comments come two days after Deputy Attorney General Rod Rosenstein Rod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book MORE announced Mueller's indictment of the Russian officials for conspiring to influence the 2016 presidential election.

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Eleven of the defendants are charged with conspiring to hack into networks used by the Democratic National Committee and the Democratic Congressional Campaign Committee. The other is charged with conspiring to hack into systems used to administer U.S. elections.

Though the intelligence community has concluded that Russians influenced the 2016 election, President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE has repeatedly insisted the Mueller probe is a "witch hunt."

The language is reminiscent of arguments used by former President Nixon in the early days of the Watergate scandal, which Bernstein famously uncovered.

"Nixon, Aides Believe Hearing is Witchhunt," read the headline of a 1973 story by Bernstein and his partner, Bob Woodward.

Just last week, Trump called the investigation's authenticity into question given FBI agent Peter Strzok's early involvement.

"How can the Rigged Witch Hunt proceed when it was started, influenced and worked on, for an extended period of time, by former FBI Agent/Lover Peter Strzok?" Trump tweeted. "Read his hate filled and totally biased Emails and the answer is clear!"

Strzok was removed from the investigation after it came to light that he exchanged text messages that were critical of Trump.

Bernstein said Trump will have to discuss Russia's election interference during his summit with Putin in Helsinki on Monday.

"We do have to assume that what we saw from Rod Rosenstein on Friday is very much part of the dynamic of Helsinki," Bernstein said on CNN's "Reliable Sources."

Bernstein has previously said that President Trump lies more than any other president in history.