In an honest investigation, there is no way to review 650K emails in a few weeks to clear Hillary. Operative word being “honest.” In a way, if he stood up and refused to indict Clinton again, that’d damn her in and of itself.
It would take an hour to index, after which you could keyword search it and distribute the results.
Within four hours, you would probably have enough evidence that a forensics team could do the metadata analysis on to have indictments ready within 12 hours.
There are military intelligence teams who take phones confiscated from hajis and can turn them inside out inside of 25 minutes. This takes no time at all.