Alexandria, Virginia (CNN) President Donald Trump's former campaign chairman Paul Manafort has been found guilty on eight counts of financial crimes, a major victory for special counsel Robert Mueller.

But jurors were unable to reach a verdict on 10 charges, and Judge T.S. Ellis declared a mistrial on those counts.

Manafort was found guilty of five tax fraud charges, one charge of hiding foreign bank accounts and two counts of bank fraud. He faces a maximum of 80 years in prison.

The news came at the same time Trump's former lawyer Michael Cohen was in a New York federal court to plead guilty to multiple counts of campaign finance violations, tax fraud and bank fraud.

Landing in Charleston, West Virginia, Trump said that the charges Manafort was convicted of on Tuesday have "nothing to do with Russian collusion" and criticized Mueller's investigation for arriving at this point.

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