"Special counsel Robert S. Mueller III announced Wednesday he was closing his office and offered his first public comments on the results of his work, asserting that Justice Department legal guidance prevented him from accusing President Trump of a crime and noting cryptically that the Constitution 'requires a process other than the criminal justice system to formally accuse the president of wrongdoing.' ...
"He noted that his team found 'insufficient evidence' to accuse Trump's campaign of conspiring with Russia to tilt the 2016 election, but emphasized they did not make a similar determination on whether the president obstructed justice.