Attorney General William Barr, later on Congress on Friday evening, said he may be in a position to brief lawmakers on Mueller's "principal conclusions" as early as this weekend.
"I remain committed to as much transparency as possible, and I will keep you informed as to the status of my review," he wrote.
The news that Mueller had submitted the long-anticipated report quickly across Capitol Hill and beyond, with members from both parties issuing a blizzard of statements calling for the full report to made public.
Barr has been committed to doing so, saying during his confirmation hearing before the Senate in January that he would be disclose "as much information available as possible with the rules and regulations that are part of the special counsel regulations. . " He left open the possibility that he can keep the report undisclosed under claims of executive privilege.
Republicans are the news that Trump had committed to wrongdoing related to Russia's efforts to interfere in the election to help him win.
Apart from the Mueller probe, Democrats have launched a series of wide-ranging investigations of their own into Trump's actions, including his relationships with Russian officials and business figures.
"The American people have a right to the truth," they said.