Justice Department Inspector General Michael Horowitz testifies before the Senate Judiciary Committee on his findings regarding the FBI investigation into President Trump's 2016 campaign.

Horowitz's report, released Monday, found that the probe was flawed but that agents were not motivated by political bias.

Read his opening remarks below.

Justice Department Inspector General Michael E. Horowitz will told lawmakers Wednesday the FBI’s investigation into alleged ties between Russia and the Trump campaign was a failure by the bureau’s “entire chain of command.”

Testifying before the Senate Judiciary Committee, Mr. Horowitz said the FBI’s application to monitor a Trump campaign aide was riddled with errors and omissions, and the brass should have better managed the agents.

Justice Department Inspector General Michael Horowitz is testifying Wednesday about his findings that the FBI investigation of President Trump’s 2016 campaign featured “serious performance failures” but was not motivated by political bias.

The inspector general’s appearance before the Senate Judiciary Committee comes amid a tense standoff among senior government officials over the 434-page report analyzing the FBI investigation in 2016 to determine if anyone in the Trump campaign was conspiring with Russia to interfere in the presidential election.

A former FBI lawyer is being investigated for allegedly altering a document connected to the surveillance of Trump campaign adviser Carter Page, according to a report Thursday.

CNN reported the investigation, citing several sources briefed on the matter.

The FBI official was not identified nor is it clear exactly how the allegedly altered document influenced the investigation of Mr. Page. Sources told CNN the changes were significant enough to manipulate the document’s meaning.

Three Senate committee chairmen demanded answers this week about the role played by the Justice and State departments in furthering the goals of Christopher Steele, the former British spy who compiled the discredited anti-Trump dossier that helped launch the special counsel’s investigation.

A music promoter who promised Donald Trump Jr. over email that a Russian lawyer would provide dirt about Hillary Clinton in June 2016 made the offer because he had been assured the Moscow attorney was “well connected” and had “damaging material,” the promoter testified to the Senate Judiciary Committee.

Donald Trump Jr. told congressional investigators he was interested in "listening to information" from a Russian lawyer that could damage Hillary Clinton's campaign, but he said he did not discuss the June 2016 Trump Tower meeting with his father.

Donald Trump Jr. and other key figures involved in an infamous Trump Tower meeting with Russian figures during the heat of the 2016 presidential campaign largely downplayed its significance and said Hillary Clinton was hardly discussed despite past speculation, according to newly released transcripts from Senate Judiciary Committee interviews.

Senate Judiciary Committee released 2,500 documents of interviews with Trump’s son and others who met with Russian attorney at Trump Tower