I am asking a serious question here, I am not downplaying the issue but more considering the range of issues. There is the political and the legal. Some which if the information were immediately released would have a vastly different impact.
So, very worse I assume would be evidence of foreign interference in U.S government affairs. Possibly names of U.S operatives, details of ongoing campaigns or operations. Or, could the worst be details of corruption involving her Foundation?
It seems most pundits believe that her email server issues is already “priced in” with voters. However, this is obviously dependant on the facts behind the emails, the devil is in the details. Surely even her most staunch supporters couldn’t continue to support her if she was involved in treason or selling secrets for example, could they? If it were simply conversations, or minutes of a meeting for example it might be different. Obviously intent would be a major factor here as well.
Regardless, this recent act by Comey is going to push this debate well into the first term if she wins. Him doing so seems extremely calculated, he would have had to have thought about this decision for some time, it would appear that he wants to make sure that if she wins that the investigation HAS to go forward, no clemency or leeway can be granted by anyone. If he went about this quietly, the kibosh could be put on further exploration by numerous sources.