Democratic Congressional Campaign Committee cyber attacks
On Friday July 29, 2016 the Democratic Congressional Campaign Committee reported that its computer systems had been infiltrated. It is strongly believed by US intelligence sources that the infiltrator groups are Russian foreign intelligence groups that breached the Democratic National Committee's computer systems. These groups are known as Fancy Bear and Cozy Bear (or "Sofacy"). 

CrowdStrike assisted with efforts to deal with the DCCC breach. There was significant concern that the Russian Government was attempting to influence the 2016 Presidential campaign. Russian cyber intrusions into United States government and private sector computer systems significantly increased after the U.S, imposed sanctions on Russia after its invasion of the Crimea in Ukraine. It was President Obama's preference to publicize cyber attacks.

See also
Cold War II
Democratic National Committee cyber attacks
Foreign electoral intervention
Russian espionage in the United States
Russian interference in the 2018 United States elections
Social media in the 2016 United States presidential election

References

Computer security
Espionage in the United States
Russian intelligence agencies
2016 scandals
Data breaches in the United States
Controversies of the 2016 United States presidential election
Hacking in the 2010s
2016 in computing