Here are 3 pressing questions that remain about the Mueller investigation

Attorney General William Barr is reviewing Special Counsel Robert Mueller's report on whether President Trump's campaign colluded with Russian election interference, a source familiar with the situation told The Associated Press on Saturday. Barr is expected to reveal the principle conclusions of the report soon. Meanwhile, per AP, House Democrats have scheduled a conference call for Saturday to strategize over how they will proceed. As everything winds down, here are three pressing questions that remain about the Mueller investigation.

How much will Barr reveal? To state the obvious, it remains unclear just how much information the attorney general will make available to the public. Barr is under no obligation to provide any aspect of the report, but there are also no laws that prevent him from doing so. Earlier in March, Congress voted unanimously to make the report public.

Will Mueller testify? Congressional investigations into the Trump administration will continue regardless of the Mueller report's conclusions. But how much will Congress rely on Mueller going forward? Rep. Adam Schiff (D-Calif.), the House Intelligence Committee chair, said on Friday that his committee could call on Mueller to testify before them if the report is not made fully available to Congress.

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Is this really the last major legal threat to Trump's presidency? The White House was reportedly feeling very confident about the conclusion of Mueller's investigation. But an undisclosed number of federal and state investigations grew out of Mueller's work that will continue to lurk behind the Trump presidency. These include the prosecution of Trump political adviser Roger Stone, as well as inquiries into the business dealings of close Trump associates like Elliott Broidy and Thomas J. Barrack. No matter how it shakes out, it is therefore unlikely that Trump will be fully in the clear.