Richard Gates, a former campaign adviser for President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE, has agreed to testify against his former associate 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 as part of a plea deal with 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, the Los Angeles Times reported Sunday.

The former adviser and Manafort business associate is reportedly nearing a deal with Mueller’s team and will plead guilty to fraud charges in the next few days, according to the Times.

Gates and Manafort were both indicted in Mueller’s probe in October and pleaded not guilty to the charges.

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CNN first reported last week, however, that Gates had been working to strike a deal with Mueller.

A person close to the talks told the Times that Gates will change his plea "within the next few days" and that he expects to receive a far shorter sentence if he cooperates with Mueller's office.

Gates's defense lawyer did not return the Times's request for comment. And a spokesman for Mueller declined to comment to the newspaper.

Gates hired a prominent white-collar attorney last month, who was spotted twice meeting with Mueller’s team. The meeting fueled speculation that Gates was moving to cooperate with the special counsel.

Mueller accused Manafort of bank fraud in a court filing Friday, but did not file new criminal charges against the former Trump campaign head.

Former Trump campaign staffer George PapadopoulosGeorge Demetrios PapadopoulosTale of two FBI cases: Clinton got warned, Trump got investigated Trump says he would consider pardons for those implicated in Mueller investigation New FBI document confirms the Trump campaign was investigated without justification MORE and former national security adviser Michael Flynn have both pleaded guilty to charges in Mueller's probe.

The special counsel also indicted 13 Russian nationals and three Russian groups on Friday for allegedly interfering in the 2016 election.