President Donald Trump fired Comey on May 9, 2017. Statements from Trump and the White House suggested that Comey had been fired to ease the "pressure" Trump was under due to the Russia investigation. Later that month, Comey arranged for a friend to leak to the press a memo he had written after a February 14, 2017 private meeting with the president. It said Trump had asked him to end the FBI's investigation into Michael Flynn, the former national security advisor. The dismissal, various memos detailing meetings with Trump, and Comey's subsequent Congressional testimony in June that same year were interpreted by some commentators as evidence of obstruction of justice by the president and became part of the Mueller investigation. Inspector General Horowitz found that Comey violated FBI policy regarding the memos, but the Department of Justice declined to prosecute Comey. In December 2019, Horowitz released a report finding no political bias against Trump by Comey or other FBI officials.