"The filing of this latest complaint is just further evidence of how far-reaching and carefully planned Russia's assault on American democracy has been," said a former U.S. official with knowledge of the Russia investigation, who spoke on the condition of anonymity because of the ongoing probe. "To anyone who doubts that the Russian counterintelligence threat is real, this complaint should be further proof that it's a threat that is live, real, and urgent for the country to grapple with."