Michael Sussmann, a lawyer who represented Hillary Clinton’s presidential campaign and the Democratic Party, was acquitted by a federal jury on Tuesday of a single count of lying to the FBI, The Associated Press reported.

The decision is a major blow to special counsel John Durham’s investigation into the origins of the bureau’s scrutiny into former President Trump’s 2016 campaign.

The case had been the biggest of Durham’s investigation, which has lasted three years and has done little to support Trump’s claims of a politically motivated witch hunt into alleged ties between him and Russia.

Durham’s case against the former Perkins Coie partner had been controversial from the beginning. The special counsel’s office alleged Sussmann arranged a meeting in October 2016 with James Baker, then the FBI’s general counsel, to provide data purporting to show suspicious internet traffic between Trump and Alfa Bank, a Russian financial institution.... Read More: The Hill