Sen. Richard Blumenthal (D-Conn.) said Tuesday that he is nearly certain that former Trump aides Paul Manafort and Michael Flynn would be indicted after special counsel Robert Mueller’s probe into Russia's election interference.

“I'm about 99 percent sure there will be some criminal charges from this investigation,” Blumenthal told Politico, saying he was most certain about Manafort, a former campaign chairman for President Trump, and Flynn, Trump's first national security adviser, facing indictment.

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He added that “there may well be others" that face charges as a result of Mueller’s probe.

Mueller’s probe has homed in on Manafort in recent months. FBI agents working with Mueller raided Manafort’s home in July, and he was reportedly told during the raid that he should expect to be indicted.

The federal government reportedly wiretapped Manafort during and after the 2016 election cycle.

Flynn has also been under scrutiny since he resigned as national security adviser for misleading Vice President Pence about what he discussed in meetings with Russian officials. He has refused to testify before congressional committees also investigating Russia's election meddling without the promise of immunity.