The conduct of the FBI and the Department of Justice during the Muller probe was the subject of a major investigation by the Inspector-General of the DOJ, Michael Horowitz. His report, released in December 2019, was a devastating indictment of the conduct of these agencies. Of most concern was the obtaining of FISA warrants to carry out surveillance of Trump campaign figures, which relied on the so-called Steele dossier, which the FBI knew to be baseless after they interviewed the principle source in January 2017.
Before leaving office, the Attorney-General in the Trump administration Bill Barr appointed a Special Counsel to investigate this conduct, John Durham. To the frustration of Trump, this investigation yielded very little in the way of results by the time of the 2020 election.
However since then things have started to come to a head, with the issuing of a number of indictments of people closely involved with the Clinton campaign. The most recent (12 February) court filing by Durham contains stunning allegations of the enlisting by figures close to Clinton, including her chief legal adviser, of an information technology company to carry out surveillance not just of the campaign but even the Executive Office after Trump was sworn in as President.
Special counsel John Durham says he is building a case to show the technology executive with whom an indicted Democratic lawyer on the payroll of Hillary Clinton's campaign was working to build a Trump-Russia collusion narrative gained access to internet traffic at the White House to try and obtain dirt on former President Donald Trump.
Left-wing lawyer Michael Sussmann was indicted last year for allegedly concealing his clients, among them Clinton's 2016 presidential campaign, from the FBI when he volunteered since-debunked claims of a secret back channel between the Trump Organization and Russia’s Alfa Bank. Durham revealed in a Friday court filing that he has evidence that Sussmann’s other client (dubbed “Technology Executive-1” but known to be former Neustar Senior Vice President Rodney Joffe) “exploited” domain name system internet traffic at “a particular health care provider” (which was likely Spectrum Health), Trump Tower, Trump’s Central Park West apartment building, and “the Executive Office of the President of the United States.”
The revelations, made as part of a motion for the Washington, D.C., federal court to look into possible conflicts of interest related to Sussmann’s defense team, gave allies of Trump more reason to believe the former president was spied upon, as evidenced by an upsurge in tweets about the latest salve in the so-called Russiagate scandal.
"They didn’t just spy on Donald Trump’s campaign. They spied on Donald Trump as sitting President of the United States. It was all even worse than we thought," tweeted Mark Meadows, a former congressman who later became Trump's White House chief of staff.