Mueller writing final report on Russia probe, submission timeline unclear: Sources

(MORE: American public might never see final Mueller report on Russian election interference)

Evan Vucci/AP, FILEPresident Donald Trump listens to a question during a news conference in the East Room of the White House, Nov. 7, 2018, in Washington.

Meanwhile, President Donald Trump’s legal team has begun working with the president to craft responses to questions from Mueller’s team as part of their investigation, sources close to Trump told ABC. The nearly year and a half long investigation by the special counsel stems from allegations of Russia coordinating with members of the Trump presidential campaign.

Mueller’s team effectively worked behind closed doors in the months leading up to the 2018 midterms, taking little to no action publicly.

(MORE: Attorney General Jeff Sessions fired by President Trump, leaving Mueller probe in new hands)

AP, FILEFormer FBI Director Robert Mueller departs Capitol Hill, June 21, 2017, following a closed door meeting in Washington.

The special counsel’s office upheld a long-standing Justice Department guideline that calls for discretion in taking legal or law enforcement measures within 60 days of an election in an effort to avoid the impression of attempting to sway voters.

Over the course of his investigation thus far, Mueller and his team of prosecutors indicted 32 individuals and three Russian businesses on charges ranging from computer hacking to conspiracy and financial crimes.

Those indictments have led to six guilty pleas and three people sentenced to prison. Four former Trump campaign officials – including his onetime national security adviser Michael Flynn and campaign chairman Paul Manafort – are among those who have pleaded guilty.

Sourse: abcnews.go.com