For that reason, Democratic lawmakers are demanding to see Mueller’s findings in his own words—rather than summarized in the memo Barr wrote to Congress last weekend. There is nothing in the special-counsel regulations that prevents the report from being made public, let alone anything that would prevent it from being provided to Congress, according to Neal Katyal, the former acting solicitor general who helped draft the regulations in 1999. “The regulations set a floor, not a ceiling, on the amount of transparency,” he wrote in The Washington Post last week.

Read: The Trump scandals that have slipped by Congress

Making the full report available to Congress, however, let alone to the public, might be an uphill battle, experts tell me—so far, Barr and Rosenstein might be the only officials outside of the special counsel’s team who have seen the report itself. “The DOJ regulations really do leave it up to Barr to decide,” Katy Harriger, a professor at Wake Forest University and the author of The Special Prosecutor in American Politics, told me in an email. “The only constraints on that are public pressure, which, if loud and consistent enough, is likely to make him release more, rather than less, of the report.”

A Justice Department official who requested anonymity to discuss the internal deliberations said earlier this week, “We are hoping to have a public version of the report to Congress and to the public in weeks not months.” But a Democratic staffer who spoke with reporters on Thursday on condition of anonymity said that lawmakers still aren’t sure whether they will see the report itself or a summary of it, and what is in the “public version” of the report is still unclear.

Right now the main barrier standing in the way of Barr releasing Mueller’s report to Congress is the grand-jury material included in it, according to several Democratic staffers who spoke with reporters on Thursday on the condition of anonymity. Mueller empaneled a grand jury shortly after being appointed in May 2017. A grand jury hears testimony from witnesses, reviews evidence provided by the prosecutor, hears jury instructions that define the law, and then votes on whether a target should be indicted—as such, the grand-jury materials are key to understanding the full scope of the investigation. Federal rules of criminal procedure obligate Barr to redact the grand-jury material, although in some past instances, such material was released to Congress. The Watergate “Road Map,” for example, which was unsealed by the Washington, D.C., District Court in October, was written by the grand-jury foreman at the time specifically for Congress. It outlined the evidence the jury received over the course of the Watergate probe, but made no recommendation about the best course of action—only that the jury should “presently defer to the House of Representatives and allow the House to determine what action may be warranted at this time by this evidence.”