Among the findings: Former FBI director James Comey was accused of doing the very thing his agency was investigating Clinton for - using a personal Gmail account at times to conduct official business.
"We found that it was extraordinary and insubordinate for Comey to do so, and we found none of his reasons to be a persuasive basis for deviating from well-established Department policies in a way intentionally created to avoid supervision by department leadership over his actions", the report says.
Yet, as Guy pointed out, the report shows it wasn't only Strzok and Page who were expressing their anti-Trump political opinions.
"The OIG report makes clear that we've got some work to do", Wray said.
A long-serving law enforcement official, Mr Comey became a controversial figure in the 2016 election, drawing accusations from both Republicans and Democrats that his handling of an investigation into Mrs Clinton's emails influenced the campaign.
Inspector general Michael Horowitz will criticize Strzok's and Page's conduct in Thursday's report, according to The New York Times.
Trump, seeking to discredit special counsel Robert Mueller's Russian Federation investigation, has eagerly awaited the report in hopes that it would skewer the judgment of Comey and make clear that his termination - central to the question of whether the president sought to obstruct justice - was justified.
The IG report's criticism of Comey's late October 2016 re-opening of the Clinton email investigation, and its findings of Comey's own private email use, certainly qualify as "damning revelations" against the legitimacy of the 2016 election.
"The FBI does not have the power to charge individuals or organizations with crimes", the former FBI official stated.
The investigation also found that Clinton should not have been charged, despite what Trump has asserted in the past. She also failed to assert herself against Comey's decision to announce the end of the investigation in July, 2016, the report added.
On Thursday, after a Department of Justice inspector general's report backed up the conclusion of that investigation, the former secretary of state must have felt some additional relief. Comey, however, managed to infuriate Democrats and Republicans with his actions-the former by announcing in the final weeks of the campaign that the Federal Bureau of Investigation was looking into new information related to the email server, and the latter for subsequently concluding that she didn't break the law.
"The FBI should not have spoken publicly about the case after recommending against criminal charges", the two Democratic leaders said.
The inspector general says he did not follow regulations. And Comey did not reveal to Attorney General Loretta Lynch his plans to make an announcement.
Lynch rebuffed calls for her recusal from the investigation, choosing instead to assert that she would accept the recommendation of career prosecutors.