But, predictably, here's where Trump takes his response too far.
Horowitz says Comey's press conference was not only "extraordinary and insubordinate" but violated Justice Department norms aimed at protecting subjects of investigations that do not result in criminal charges. The report says this attorney, called "FBI Attorney 2", was "the primary FBI attorney assigned to (the Russia) investigation beginning in early 2017" and had also worked for Mueller after he was appointed.
"Under these circumstances, we did not have confidence that Strzok's decisions to prioritize the Russian Federation investigation over following up on the Midyear-related investigation lead discovered on the Weiner laptop was free from bias". What about the anti-Trump text messages?
Trump's issue is with top officials within the agency, not the everyday agents.
"I did a great service to the people in firing him", the United States president tweeted. While Republicans blasted his initial decision to exonerate Clinton, Democrats blamed the former FBI director for costing them the presidential election by reopening the investigation so close to the election.
But a almost two-year investigation by the Justice Department's watchdog found no evidence that those private sentiments expressed by Strzok actually influenced his work.
The inspector general report, while damaging to the FBI and to Comey personally, does not support Trump's allegation that political preferences influenced the conduct of the email investigation into his Democratic presidential rival.
Image Mr Comey says he respected the work of the inspector general
Trump hasn't made a decision yet, and his legal team will spend the weekend doing research and reading through a Justice Department inspector general's report to determine whether they can make a case that Mueller's investigation is invalid because of findings of bias at the FBI, Giuliani said.
However, the inspector general did not find political considerations affected the outcome of either agent's work.
"While we did not find that these decisions were the result of political bias on Comey's part, we nevertheless concluded that by departing so clearly and dramatically from Federal Bureau of Investigation and department norm", Horowitz stated in his report, adding that Comey used the personal account to conduct official business.
That probe includes a look at whether Trump himself tried to obstruct justice by firing Comey.
Perhaps the most damaging part of the report is the finding that several FBI employees who played critical roles in the investigation sent political messages, raising questions about their objectivity.
Mr Comey announced in the summer of 2016 that Mrs Clinton would not be charged with any crime, including the handling of classified material on a personal email address.