Mueller submitted the still-secret document Friday evening, capping an investigation into whether President Donald Trump or those around him conspired in Russia’s interference in the 2016 election that’s riveted Washington and cast a cloud over Trump and his administration for almost two years. Barr, 68, who was sworn in as Trump’s second attorney general about five weeks ago, is working with Deputy General Rod Rosenstein to figure out how to present Mueller’s conclusions, the official said.