The plan was to reopen the investigation and then close it before Election Day so when Killary won she could say that she was cleared during the previous administration.
McCabe got the Weiner emails and sat on them for a month. They held them and waited for the last week of the campaign to limit the damage. Not enough time to change minds.
This was orchestrated at the top by Clinton, Obama and their handlers. Comey is an errand boy. They never thought she was going to lose.