Every mass delusion has a beginning.
One day in the Middle Ages, a French nun began meowing. Other nuns soon joined in. Soon, all the nuns in the convent were meowing together several hours a day. They stopped after neighbors complained, and some soldiers threatened to beat up the nuns.
Like the chorus of meowing nuns, the Russia Truther movement began at a particular time and place: a press conference that Donald Trump conducted on July 27, 2016, in Doral, Florida.
Some background:
In March 2015, former Secretary of State Hillary Clinton admitted that, while in office, she diverted some 66,000 emails to a server in the basement of her house. As the Associated Press would determine, the server was “vulnerable to hackers” and the setup was “the subject of U.S. government and industry warnings at the time over attacks from even low-skilled intruders.”
After the diversion was discovered, Clinton returned roughly half of the stolen emails. The other half, she claimed, related to private matters and were deleted. Some, it turned out, were destroyed while under subpoena.
Despite the deletions, there was a chance that the stolen emails might be found because Russia and other adversaries probably had their own copies.
In 2015, Mike Flynn, former head of the Defense Intelligence Agency (who would be a Trump adviser), said the odds were “very high—likely,” that Russia and other countries had broken into the system. Mike Morrell, former acting director and deputy director of the CIA, said, “I think that foreign intelligence services, the good ones, have everything on any unclassified network that the government uses.”