Former Trump campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE issued a statement Friday expressing disappointment over the decision of his long-tme business associate, Richard Gates, to plead guilty to two charges stemming from 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 Russia investigation.

In the statement, Manafort maintained his innocence and said that he had hoped Gates would have had the "strength" to fight the charges against them at trial.

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"Notwithstanding that Rick Gates pled today, I continue to maintain my innocence," Manafort wrote.

"I had hoped and expected my business colleague would have had the strength to continue the battle to prove our innocence. For reasons yet to surface he chose to do otherwise. This does not alter my commitment to defend myself against the untrue piled up charges contained in the indictments against me,” he added.

Gates pleaded guilty on Friday to conspiracy against the United States and making a false statement to lawyers from the special counsel's office.

In a letter, Gates wrote that a "change of heart" and a desire to spare his family the cost of an extended legal battle led to his decision.

“Despite my initial desire to vigorously defend myself, I have had a change of heart,” Gates wrote. “The reality of how long this legal process will likely take, the cost, and the circus-like atmosphere of an anticipated trial are too much. I will better serve my family moving forward by exiting this process.”

Gates's deal with prosecutors came one day after a new superseding indictment from a Virginia grand jury brought the total number of charges against Gates and Manafort to 32.

Mueller first indicted the two former Trump aides last year, with both men initially pleading not guilty.

They are accused of making millions of dollars while lobbying in Ukraine for over a decade, then concealing the money from the U.S. government, among other things.