Sometimes public silence can be deafening or, for that matter, misleading. For nearly two years now, the intelligence community has kept secret evidence in the Russia collusion case that directly undercuts the portrayal of retired Army general and former Trump national security adviser Michael Flynn as a Russian stooge. That silence was maintained even when former Acting Attorney General Sally Yates publicly claimed Flynn was possibly “compromised” by Moscow. And when a Democratic senator, Al Franken of Minnesota, suggested the former Defense Intelligence Agency (DIA) chief posed a “danger to this republic.” And even when some media outlets opined about...