Mueller’s work has proceeded in the face of blistering attacks by Trump and his allies, who painted the investigation as part of a relentless campaign by the “deep state” to reverse the results of the 2016 election.

Still, the release of Mueller’s findings could force a decision by Democrats on a simmering issue they have said would wait until the investigation’s end: whether to begin impeachment proceedings against the president. House Speaker Nancy Pelosi, D-Calif., has said it would not be “worth it” to try to impeach Trump, but suggested she could change her mind if an overwhelming bipartisan consensus emerged.

For months, the president and his lawyers have waged as much of a public-relations campaign as a legal one — trying to discredit the Mueller investigation to keep public opinion from swaying lawmakers to move against Trump.

The Justice Department regulations governing the Mueller inquiry only required the special counsel to give a succinct, confidential report to the attorney general explaining his decisions to either seek — or decline to seek — further criminal charges. Mueller operated under tighter restrictions than similar past inquiries, notably the investigation of former President Bill Clinton by Ken Starr, who ended up delivering a 445-page report in 1998 that contained lascivious details about an affair the president had with a White House intern.

Mueller was still given a wide mandate — to investigate not only Russian election interference but “any matters that may arise directly from that investigation.” Mueller has farmed out numerous aspects of his inquiry to several U.S. attorneys’ offices, and those investigations continue

Mueller will not recommend new indictments, a senior Justice Department official said Friday, ending speculation that he might charge some of Trump’s aides in the future. The Justice Department’s general practice is not to identify the targets of its investigations if prosecutors decide not to bring charges, so as not to tarnish their reputations. Deputy Attorney General Rod Rosenstein emphasized this point in a speech in February.

“It’s important,” Rosenstein said, “for government officials to refrain from making allegations of wrongdoing when they’re not backed by charges that we aren’t prepared to prove in court.”

This article originally appeared in The New York Times