Manafort said in the same filing he disagreed with Mueller's claim that he had lied to the Federal Bureau of Investigation and the special counsel's office. This has led to political pundits, journalists, TV personalities, and commentators on both sides of the aisle to question just how "Frickin' stupid' Paul Manafort really is".
The representatives for Special Counsel Mueller did not detail what they believe Mr Manafort lied about.
In September, Manafort pleaded guilty to one count of conspiracy to obstruct justice and one count of conspiracy against the US.
He has been held in a Virginia jail since June.
Asked whether Trump is concerned about the final report that Mueller's team is expected to produce once the investigation wraps - and whether it might become public - Sanders said the president doesn't have "any concerns" about what it might say because "there was no wrongdoing by him".
In August, Manafort was found guilty in Alexandria, Va., on five tax fraud charges, one count of hiding foreign bank accounts, and two counts of bank fraud. Trump has hinted that he might pardon aides who remain loyal to the White House.
For their part, Manafort's attorneys said he believes he has offered "useful information" and doesn't agree with the government assertion that he breached the plea agreement.
Mueller: Manafort Lied During My Investigation, Voiding His Cooperation Agreement
His long-standing relationship with an oligarch close to Russian President Vladimir Putin was another reason Manafort's cooperation was seen as important to Mueller's probe. The agreement noted that, when it came time for sentencing, Mueller would let the court know how much Manafort did or did not cooperate.
Trump has consistently called the Mueller probe a "witch hunt" and strongly denies any collusion with Russian Federation in the 2016 presidential election.
After at least a dozen sessions interrogating him, the special counsel's prosecutors have decided that Manafort does not deserve leniency.
"I have never been contacted by anyone connected to WikiLeaks, either directly or indirectly", Manafort said in a statement.
It could also hamper Mueller's ability to turn an insider against Trump in the investigation of Russian meddling in the 2016 election.
While Manafort's attorneys claim that he has not actually lied to investigators, the government says otherwise, and ultimately it is the government's opinion that matters in his upcoming sentencing hearing.
Russian Federation denies US allegations it hacked Democratic Party emails and ran a disinformation campaign, largely on social media.
Celebrity lawyer Alan Dershowitz, who has frequently provided Trump with advice, said on ABC News on Sunday that Trump could take a heavy hit when Mueller completes his probe. In 2011, Obama gave his original 10-year term a two-year extension. In Manafort's plea deal, the government agreed to advocate for a lower sentence if they thought he provided "substantial assistance in the form of truthful information".More news: Sarri reveals inquest into Spurs defeat
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