The New York Times reported today,

American intelligence agencies have concluded with “high confidence” that Russiaacted covertly in the latter stages of the presidential campaign to harm Hillary Clinton’s chances and promote Donald J. Trump, according to senior administration officials.

They based that conclusion, in part, on another finding — which they say was also reached with high confidence — that the Russians hacked the Republican National Committee’s computer systems in addition to their attacks on Democratic organizations, but did not release whatever information they gleaned from the Republican networks.

The Chicago Tribune published an article December 12th that stated,

The FBI notified the Illinois Republican Party in June that some of its email accounts may have been hacked, but party officials were not told that it was part of a wide-ranging federal investigation of Russian activity in the nation’s political system, the state GOP’s executive director said Sunday.

Nick Klitzing said the state GOP on its own found 18 of its emails on the website DCLeaks.com. The New York Times reported the website was an outlet that U.S. intelligence officials and private cybersecurity companies believe was created by a unit controlled by the GRU, Russia’s military intelligence agency.