No down side for us but if you’re Comey and you have this information he had to think about his life and those of his loved ones...
Sure there's threat from the political caste yelling You sold us out, now die!
-- but if the issues are as big as I suspect then, as info comes out, he and quite possibly his family are going to be labeled as one of them
and put on the "ok to kill list" by a non-trivial percentage of 300 million Citizens.
This isn't entirely due to the emails, but instead what they connect to. For example she had Special Access Program (SAP; somewhat like compartmentalized security, as I understand) info on her server, and that the email directly and explicitly ties into the Clinton Foundation and it's operations which include international money-laundering, selling influence/favor, and apparently [I have yet to find the original ref] human trafficking. (Remember these are all on an international scope, so it's possible that things like the treasonous "Iran deal" were bought through the Clinton Foundation.)
One FBI agent leaked the info that it's not the emails we should look at, but the Clinton Foundation, he also said that the corruption was huge and essentially implied it reached all the high-level politicians and bureaucracies (Link), predicting that there would be information revealed that would likely start a second Civil/Revolutionary War and/or give legitimate cause for other nations to declare war on the US.
