PART 1: Inspector General FISA Investigation President Trump - Senate Hearing

The U.S. attorney who is conducting a wide-ranging investigation of the origins of the Trump-Russia probe released a rare statement Monday saying he disagrees with conclusions of the so-called FISA report -- after DOJ Inspector General Michael Horowitz found in that review that the probe's launch largely complied with DOJ and FBI policies.

“Based on the evidence collected to date, and while our investigation is ongoing, last month we advised the Inspector General that we do not agree with some of the report’s conclusions as to predication and how the FBI case was opened,” U.S. Attorney John Durham said in a statement.

Horowitz released his report Monday saying his investigators found no intentional misconduct or political bias surrounding efforts to launch that 2016 probe and to seek a highly controversial Foreign Intelligence Surveillance Act (FISA) warrant to monitor former Trump campaign adviser Carter Page in the early months of the investigation. Still, it found that there were "significant concerns with how certain aspects of the investigation were conducted and supervised."

“I have the utmost respect for the mission of the Office of Inspector General and the comprehensive work that went into the report prepared by Mr. Horowitz and his staff,” Durham said. “However, our investigation is not limited to developing information from within component parts of the Justice Department. Our investigation has included developing information from other persons and entities, both in the U.S. and outside of the U.S.”

As Horowitz has conducted his review of DOJ actions during the Russia probe, Durham, the U.S. attorney for Connecticut, has also been conducting a wider inquiry into alleged misconduct and alleged improper government surveillance on the Trump campaign during the 2016 presidential election.

Fox News reported in October that Durham's ongoing probe has transitioned into a full-fledged criminal investigation.

Meanwhile, Attorney General William Barr ripped the FBI’s “intrusive” investigation after the release of Horowitz’s review, saying it was launched based on the “thinnest of suspicions.”

“The Inspector General’s report now makes clear that the FBI launched an intrusive investigation of a U.S. presidential campaign on the thinnest of suspicions that, in my view, were insufficient to justify the steps taken,” Barr said in a statement.

Barr expressed frustration that the FBI continued investigating the Trump campaign, even as “exculpatory” information came to the light.