https://www.nytimes.com/2017/01/27/world/europe/russia-hacking-us-election.html?emc=edit_th_20170128&nl=todaysheadlines&nlid=27037260&_r=0
..." one current and one former United States official, speaking about the classified recruitments on condition of anonymity, confirmed that human sources in Russia did play a crucial role in proving who was responsible for the hacking.
The former official said the agencies were initially reluctant to disclose their certainty about the Russian role for fear of setting off a mole hunt in Moscow.
The public disclosure of the arrests, and the severity of the treason charge, come at a delicate moment for President Trump.
He has been loath to accept the intelligence agencies’ conclusion that Russia tried to help him win, which he sees as part of an effort to delegitimize his election.
The Russian role will loom over the conversation with Mr. Putin that Mr. Trump is scheduled to have on Saturday since it was the Russian president who James R. Clapper Jr., the former director of national intelligence, told Congress ordered the hacking and leaking..."
