Paul Manafort pleads guilty, agrees to co-operate with Mueller investigation

U.S. President Donald Trump’s former campaign chairman Paul Manafort will co-operate with Special Counsel Robert Mueller’s probe of Russian election meddling as part of a plea deal, prosecutors told a federal court in Washington on Friday.

Manafort, 69, also pleaded guilty to two criminal counts, becoming the most prominent former Trump campaign official to plead guilty in Mueller’s investigation.

The charges include conspiracy against the United States and conspiracy to obstruct justice.

Prosecutor Andrew Weissman said in court Friday that Manafort had struck a “cooperation agreement.” He did not elaborate on the agreement.

Manafort told the judge he wants to plead guilty.

WATCH: Paul Manafort to plead guilty to two criminal counts in Russia investigation, court documents say

1:33 Paul Manafort to plead guilty to two criminal counts in Russia investigation, court documents say

Manafort was facing a second trial set to begin on Monday on charges related to Ukrainian political consulting work, including failing to register as a foreign agent.

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It’s unclear how the plea might affect Manafort’s pursuit of a pardon from President Donald Trump. The president has signaled that he’s sympathetic to Manafort’s cause, and in comments to Politico, his attorney-spokesman Rudy Giuliani said a plea without a cooperation agreement wouldn’t foreclose the possibility of a pardon.

Manafort has aggressively fought the charges against him and taken shots at his co-defendant, Rick Gates, who cut a deal with prosecutors earlier this year that included a cooperation agreement.

At the time of Gates’ plea, Manafort issued a statement saying he “had hoped and expected my business colleague would have had the strength to continue the battle to prove our innocence.” And during his Virginia trial in August, Manafort’s lawyers spent considerable time painting Gates as a liar, embezzler, philanderer and turncoat who would say anything to get a lighter prison sentence.

Manafort’s plea means he will avoid a trial that was expected to last at least three weeks and posed the potential of adding years onto the seven to 10 years he is already facing under federal sentencing guidelines from his conviction in Virginia.

WATCH: Trump refuses to answer if he will pardon Manafort

0:30 Trump refuses to answer if he will pardon Manafort

A jury found Manafort guilty of eight counts of tax evasion, failing to report foreign bank accounts and bank fraud. Jurors deadlocked on 10 other counts.

In the Washington case, prosecutors were set to lay out in great detail Manafort’s political consulting and lobbying work on behalf of former Ukrainian President Viktor Yanukovych and the pro-Russian Party of Regions.

Prosecutors say that Manafort directed a large scale lobbying operation in the U.S. for Ukrainian interests without registering with the Justice Department as required by the federal Foreign Agents Registration Act, or FARA. Manafort was accused of concealing from the IRS tens of millions of dollars in proceeds from his Ukrainian patrons and conspiring to launder that money through offshore accounts in Cyprus and elsewhere.

READ MORE: Another trial looms for ex Trump campaign chairman Manafort

Manafort had denied the allegations and pleaded not guilty. Even after his indictment last October, though, prosecutors say he continued to commit crimes by tampering with witnesses. The discovery of his witness contacts led to a superseding indictment in June and Manafort’s jailing ahead of his trial.In addition to the witness tampering counts, Manafort had been formally charged with acting as an unregistered foreign agent, conspiring to launder money and lying to the FBI and Justice Department about the nature of his work. Court papers filed in the case indicated that he could have faced between 15 and 19 1/2 years in prison under federal guidelines.The charges do not relate to Russian interference in the 2016 presidential election.WATCH: How convictions of Manafort, Cohen compare to Watergate

2:13 How convictions of Manafort, Cohen compare to Watergate