I think some of you are misunderstanding how the Russian hacking would influence the vote. They didn't hack into the voting machines and turn a "D" to an "R"; they used spear-phishing to attempt to gain access to local government agencies who were providing election related services. They attempted to steal login credentials and open back doors to software companies involved in voter databases and absentee ballot requests by using those 'spam' e-mails we've all seen. In some cases, they succeeded and they got in.
So, Comey is correct; they didn't turn a single vote. That's because the aim of this attack wasn't to turn votes, it was to prevent them from being cast via misplaced absentee ballots or minor errors in a voter's registration information. It's a much shrewder way of doing it, and one that would be incredibly difficult to catch. If you went to vote but couldn't because your birth date was wrong (or if your absentee ballot never got to you), you definitely wouldn't suspect that it was the Russians that were responsible.
The beauty of this is that they wouldn't have to do this all over the country to be effective; they would only have to target specific counties in certain key states.
Edited by Jables, 08 June 2017 - 10:35 AM.