UPDATE: Mueller and Manafort's lawyers have asked for an extension to file the joint status report due Friday. From BuzzFeed News' courts and justice reporter:
The joint request:
Rick Gates still is cooperating with several ongoing investigations, and both his attorney and the special counsel have filed a motion to update the court again within 60 days and no later than January 15, 2019.
Gates pleaded guilty in February to conspiracy against the United States and lying to the FBI.
The delay, laid out in a new one-page joint filing, stands in contrast to two other high-profile former Trump officials — Michael Flynn and Paul Manafort — who are moving toward sentencing after also pleading guilty and cooperating with the special counsel’s probe.
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Flynn, Trump's former national security adviser who pleaded guilty last December for lying to the FBI about his contacts with Russian officials during the Trump transition, is scheduled to be sentenced Dec. 18
And lawyers for former Trump campaign chairman Paul Manafort and the special counsel have a Friday deadline to file their first joint status report ahead of his sentencing with the D.C. Circuit judge overseeing a portion of his case.
Manafort is also scheduled to be sentenced Feb. 8 for his conviction on bank and tax fraud charges in federal court in Alexandria, Va. At that trial, Gates testified against Manafort.
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The pre-sentencing memos for both Flynn and Manafort may spell out some of the details about their cooperation, including how frequently they’ve met with investigators and whether they’ve agreed to testify in future trials.
Several former federal prosecutors interviewed about the upcoming filings said they may offer insight into some of Mueller’s potential end game plans, but cautioned that observers cannot glean too much from the materials.
Mueller delays sentencing for ex-Trump aide Gates over ongoing cooperation (Politico)