The Kremlin began working behind the scenes to disrupt the 2016 election more than two years in advance. But even when Russian interference became obvious, U.S. officials spent weeks watching the infiltration occur before they could fight it off.

The Democratic National Committee's cybersecurity contractor, CrowdStrike, announced in June 2016 that Russian hackers had compromised the organization's network. The New York Times reported Thursday that CrowdStrike had actually been battling with hackers for weeks. Robert Johnston, a lead investigator for the company, said the hackers "were like a thunderstorm moving through the system — very, very noisy."

Despite the noise, CrowdStrike and the DNC didn't make any noise of their own about the hacking, choosing instead to quietly work to discern how Russians had broken in and figure out how to block them. Russia managed to obtain thousands of documents from the DNC's network, and provided them to WikiLeaks for publication.

"We knew it was the Russians, and they knew we knew," Johnston told the Times of the cyberwarfare. "I would say it was the cyber equivalent of hand-to-hand combat." Russian hackers may have intercepted communications about the DNC's efforts to fend off their attacks, helping them to dodge attempts to shut down their malware. Twelve Russian intelligence officers were indicted in July 2018 for the break-in. Read more at The New York Times. Summer Meza