John Durham, the Trump-era special counsel who for four years has pursued a politically fraught investigation into the Russia inquiry, accused the F.B.I. of a “lack of analytical rigor” in a final report made public on Monday that examined the bureau’s investigation into whether the 2016 Trump campaign was conspiring with Moscow. Mr. Durham’s 306-page report appeared to show little substantial new information about the F.B.I.’s handling of the Russia investigation, known as Crossfire Hurricane, and it failed to produce the kinds of blockbuster revelations impugning the bureau that former President Donald J. Trump and his allies had once suggested that Mr. Durham would find. Instead, the report — released without substantive comment or redactions by Attorney General Merrick B. Garland — repeated previously exposed flaws in the inquiry, including from a 2019 inspector general report, while concluding that the F.B.I. suffered from a confirmation bias as it pursued leads about Mr. Trump’s ties to Russia.

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