For weeks, allies of President Trump ratcheted up pressure to “release the memo.” The impact, according to supporters, would be monumental: It would shake the F.B.I. “to its core” (Representative Jeff Duncan of South Carolina) or it would reveal abuses “100 times bigger” than what incited the American Revolution (Sebastian Gorka, a former White House official). The president himself said, after the memo’s release on Friday, that it “vindicates” him in the probe. But it does no such thing