Washington, DC - 21 August 2013

1. FILE: Still of Robert Mueller speaking during interview at FBI headquarters

Washington - 19 March 2019

2. SOUNDBITE: (English) Eric Tucker, Associated Press Justice Department Reporter: +++SOT PARTIALLY COVERED BY VARIOUS STILLS+++

"The Special Counsel Robert Mueller's investigation is ending. For many in Washington who cover it closely like myself, in many ways, the work continues, just as it did before, because there's going to be ongoing clashes on Capitol Hill as to how much information can be released and what to do with that information. There are going to be continuing stories about the substance of the Special Counsel's nearly nearly two year long investigation -- what he found, what he didn't find and what impact that has on the Trump administration and the remainder of the Trump presidency."

Washington, DC - 8 February  2019

3. GOP Rep. Doug Collins expresses exasperation during Judiciary Committee hearing

Washington, DC - 13 June 2013

4. FILE: Still of Robert Mueller testifies at House Judiciary Committee hearing

Washington, DC - 17 March 2019

5. FILE: Still of President Trump and First Lady walk to motorcade after church

Washington - 19 March 2019

6. SOUNDBITE: (English) Eric Tucker, Associated Press Justice Department Reporter: +++SOT PARTIALLY COVERED BY STILLS+++

"There are just a couple things that the attorney general has to provide to Congress. One is notification that Mueller's investigation has concluded. He also has to advise him of something else that's really specific and interesting and that is any moment in which an investigative step or action that was proposed by the special counsel was rejected or turned down by the Justice Department. So that's something he's actually required under the regulations to provide. And that's it. But what he committed to do in his confirmation hearing was to make as much of the information from Mueller's report and as much of his findings public as possible, as permitted, under the law."

Washington, DC - 15 January 2019

7. William Barr testifying at Senate Judiciary Committee hearing on confirmation

Washington, DC - 13 June 2013

8. FILE: Still of Robert Mueller testifies at House Judiciary Committee hearing

Washington, DC - 15 January 2019

9. Various of William Barr taking oath at Senate Judiciary Committee confirmation hearing

Washington - 19 March 2019

10. SOUNDBITE: (English) Eric Tucker, Associated Press Justice Department Reporter: +++SOT PARTIALLY COVERED BY STILLS+++

"It is not clear that the underlying Mueller report, from page to page, will ever be seen by the public because what the attorney general is committed to doing is taking that report and basically editing it to sanction out or or delete from public view any sort of classified information that he thinks is not ready to be seen by the public. However, there is a scenario in which Congress could attempt to subpoena the document itself or subpoena the special counsel to say, 'We want you to come to Capitol Hill and we want to ask you exactly what you found. And we want you to tell us."

Washington, DC - January 2019

11. William Barr testifying at Senate Judiciary Committee confirmation hearing

Washington, DC - 8 February 2019

12. FILE: Still of House Judiciary Chairman Jerry Nadler holding hearing

Washington, DC - 6 February 2019

13. FILE: Still of House Intelligence Committee Chair Adam Schiff speaks with reporters

Washington - 19 March 2019

14. SOUNDBITE: (English) Eric Tucker, Associated Press Justice Department Reporter:

"One thing that the attorney general said in his confirmation hearing -- he was asked specifically about this idea of will you let the president's attorney, Rudy Giuliani, receive and edit any report that is transmitted before it's publicly released and he said unequivolcally no. But that's a distinction though an important difference because the White House, the actual White House attorneys, the White House Counsel's Office, they might very well attempt to legally invoke some sort of privilege to say that there's certain information that's contained, or is likely contained, in this documenreport that should not be released because it reflects executive privilege."

Washington, DC - January 2019

15. FILE: Still of William Barr testifying at Senate Judiciary Committee confirmation hearing

Washington - 19 March 2019

16. Still of President Donald Trump walks toward Rose Garden at the White House

Washington - 14 March 2019

17 FILE: Still of President Donald Trump seated in Oval Office

Once Special Counsel Robert Mueller completes his Trump-Russia investigation, he will hand a report over to the Attorney General. We may not get all the details uncovered, at least not right away, but here's what we can expect:

Mueller has to turn in a report of some kind. It could be pretty bare-bones. Justice Department regulations require only that Mueller give the attorney general a confidential report that explains the decisions to pursue or decline prosecutions. That could be as simple as a bullet point list or as fulsome as a report running hundreds of pages.

Barr indicated that he expects to use his report to share the results of Mueller's investigation with the public, which the regulations allow him to do. But he hedged on specifics and said his plans could change after speaking with Mueller and Rosenstein.

It is unclear whether Trump will ask to see the report and under what circumstances he or his attorneys might be able to view it, especially because the document is meant to be confidential for Justice Department leadership. Mueller reports to the Justice Department, not the White House.

Barr said at his confirmation hearing that he would not permit White House interference in the investigation. But he also has voiced an expansive view of executive power in which the president functions as the country's chief law enforcement officer and has wide latitude in giving directives to the FBI and Justice Department.

While delivery of the report to the Attorney General marks the end of Special Counsel Robert Mueller's investigation, for many who cover Washington politics, the work continues.

"There's going to be ongoing clashes on Capitol Hill as to how much information can be released and what to do with that information," says Associated Press reporter Eric Tucker.

He adds there will also be questions about the Justice Department and "the politicization of law enforcement."