The Senate Intelligence Committee report on Russian interference in the United States presidential election, officially titled Report of the Select Committee on Intelligence United States Senate on Russian Active Measures Campaigns and Interference in the 2016 U.S. Election, is the official report in five volumes documenting the findings and conclusions of the United States Senate Intelligence Committee concerning the Russian attack efforts against election infrastructure, Russia's use of social media to affect the election, the U.S. government's response to Russian activities, review of the Intelligence Community Assessment, and counterintelligence threats and vulnerabilities. The redacted report is 1,313 pages long. It is divided into five volumes. The first volume of the report was released on July 25, 2019, and the fifth and last volume was released to the public on August, 18, 2020. The Senate Intelligence Committee's investigation extended more than three years, includes interviews of more than 200 witnesses, and reviews more than one million documents. Marco Rubio, acting committee head, said that "no probe into this matter has been more exhaustive.” On the stature of the report, the Senate Intelligence Committee said the report is "the most comprehensive description to date of Russia's activities and the threat they posed". The Republican-led Senate Intelligence Committee submitted the first part of its five-volume report in July 2019 in which it concluded that the January 2017 intelligence community assessment alleging Russian interference was "coherent and well-constructed". The first volume also concluded that the assessment was "proper", learning from analysts that there was "no politically motivated pressure to reach specific conclusions". The final and fifth volume, which was the result of three years of investigations, was released on August 18, 2020, ending one of the United States "highest-profile congressional inquiries." The Committee report found that the Russian government had engaged in an "extensive campaign" to sabotage the election in favor of Donald Trump, which included assistance from some members of Trump's own advisers. Like the Mueller report that preceded it, the report does not find a criminal conspiracy between Russia and the Trump campaign, but it does go further than the Mueller report in detailing the ties found between Trump campaign members and Russian individuals. In particular, it describes Paul Manafort as "a grave counterintelligence threat". According to the report, "some evidence suggests" that Konstantin Kilimnik, to whom Manafort provided polling data, was directly connected to the Russian theft of Clinton-campaign emails. In