FILE PHOTO: Former FBI Director James Comey is sworn in prior to testifying before a Senate Intelligence Committee hearing on Russia's alleged interference in the 2016 U.S. presidential election on Capitol Hill in Washington, U.S., June 8, 2017. REUTERS/Jonathan Ernst/Files

WASHINGTON (Reuters) - The report from Special Counsel Robert Mueller said there is “substantial evidence” that President Donald Trump fired FBI Director James Comey due to his “unwillingness to publicly state that the president was not personally under investigation.”