The onetime deputy on the 2016 Trump campaign “continues to cooperate with the government,” according to the filing. That includes plans for Gates to testify this week in Jackson’s courtroom in the Mueller-era trial against Roger Stone, the longtime Trump associate fighting charges he lied to Congress and obstructed its investigation into Russian interference in the last presidential race.

Gates faces a maximum total sentence of 10 years in prison on the two charges he pleaded guilty to: conspiracy against the U.S. and making false statements to the FBI. However, nonbinding federal sentencing guidelines usually call for much shorter sentences in white-collar cases, particularly for first-time offenders.

But he is likely to get credit under the guidelines for his cooperation with prosecutors — including testimony delivered in front of Jackson. She also has the authority to go below the guidelines, even potentially imposing a sentence of house arrest, or probation alone.

Gates has already served as a key witness in two other government cases that grew out of the Mueller investigation.

First, Gates testified in the summer of 2018 against his former boss, Paul Manafort, who is now serving a 7½-year sentence tied to his conviction in a bank- and tax-fraud trial and a separate guilty plea for lobbying and witness-tampering crimes.

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He also took the witness stand earlier this summer against Greg Craig, the former White House counsel in the Obama administration, who was acquitted by a jury on charges he tried to deceive Justice Department investigators about his role in preparing a report for the Ukrainian government in 2012.

Jackson still must sign off on Gates’ sentencing date, which if it comes in December could happen around the same time as another central figure from the Mueller probe, Michael Flynn. The former Trump national security adviser also pleaded guilty in the special counsel investigation — in late 2017 — for lying to the FBI about his contacts with Russia’s ambassador to the United States.

U.S. District Court Judge Emmet Sullivan has set a tentative date of Dec. 18 for Flynn’s sentencing, though the case has also taken a strange twist after Flynn hired a combative new attorney who last week said she planned to file a motion to get the entire case dismissed because of what she claims is “egregious government misconduct.”

Josh Gerstein contributed to this report.