U.S. Attorney General William Barr speaks at a news conference to discuss Special Counsel Robert Mueller’s report on Russian interference in the 2016 U.S. presidential race, in Washington, U.S., April 18, 2019. REUTERS/Jonathan Ernst

WASHINGTON (Reuters) - Attorney General William Barr on Thursday released Special Counsel Robert Mueller’s report on Russia’s role in the 2016 U.S. election, providing details about a 22-month inquiry that cast a shadow over Donald Trump’s presidency.