It's unlikely Comey would've survived had Hillary triumphed, but the Trump victory portended a different kind of problem.
Trump quickly retweeted at least a half dozen posts about the report from the "Fox & Friends" morning show on Fox News Channel.
"We found no evidence that the conclusions by the prosecutors were affected by bias or other improper considerations; rather, we determined that they were based on the prosecutors' assessment of the facts, the law and past department practice", the report said.
Trump allies seized upon text messages between agents, pointing to one from August 2016 that said "We'll stop it" with regard to a potential Trump victory and another from a bureau lawyer that said "Viva le resistance". "We'll stop it", Strzok replied.
"The IG Report is a total disaster for Comey, his minions and sadly, the FBI", Trump wrote.
The committees" memo also says it appears the outcome of the investigation was "predetermined' in May, two months before Comey's press conference and before multiple interviews had taken place.
During the hearing set for Monday afternoon, Republicans on the committee are likely to grill current FBI Director Christopher Wray, who insisted Thursday that "nothing in the report impugns the integrity of our workforce as a whole, or the FBI as an institution".
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Whether the Justice Department's former top lobbyist improperly shared information with the Clinton campaign or should have been recused because of his friendship with campaign chairman John Podesta.
The report describes some of those messages, including one the day after the election in which he lamented the results and said he was "so stressed about what I could have done differently". Page pinged Strzok and said: Don't you want to join an investigation that could lead to impeachment? He'd tell Trump what he wanted to hear in private, while misleading him - failing, for example, to tell him that impetus for the collusion investigation was a document paid for by Democratic operatives.
The FBI leadership waited almost a month after receiving initial information about the laptop to reopen the investigation and notifying Congress about it, the IG report shows.
The report was also critical of the exchange of anti-Trump text messages between Federal Bureau of Investigation agent Peter Strzok and former Federal Bureau of Investigation lawyer Lisa Page.
So the laptop's evidence simmered for a month until just before the 2016 election, Tapper tweets.
Meanwhile, Mueller's investigation has recently taken on increased urgency and higher stakes.
Trump has since attacked the report, claiming that its conclusion was "ridiculous" and that it revealed further bias against the president in the Justice Department.
But Sen. Richard Blumenthal, Democrat from CT, declared that "any effort to use this report as an excuse for shutting down the special counsel's investigation is both disingenuous and unsafe". Giuliani also predicted that Strzok would be in jail in the coming days. But it found that his decisions were not driven by political bias.