"...U.S. intelligence and law enforcement agencies saw some warning signs of Russian meddling in Europe and later in the United States but never fully grasped the breadth of the Kremlin’s ambitions. Top U.S. policymakers didn’t appreciate the dangers, then scrambled to draw up options to fight back. In the end, big plans died of internal disagreement, a fear of making matters worse or a misguided belief in the resilience of American society and its democratic institutions."