Even in my most distorted and dystopian reality I think I live in I can't figure out how reopening and investigation mere days before the election was supposed to help Hillary more than just keeping his mouth shut.
Comey is not a good guy, but I believe he tried to let the American people know as much as he could, without taking down Obama.
I have always wondered at the “WHY” reopen the investigation. I think the answer has to do with Wieners laptop. It was discovered and given as the reason to reopen the investigation right before the election. Either the laptop had something on it or they were afraid the laptop had something on it that needed to be buried. By reopening the investigation the FBI could seize the laptop and suppress whatever was on the laptop. Remember they supposedly reviewed all thousands of email in just a few days. In truth nobody looked at the dammed thing, the whole purpose was to prevent anything on the laptop from becoming public.
Interesting comment: Oath Keepers Stand By
I think Coney panicked when Weiner’s laptop showed up with thousands of Hillary’s emails. So, to cover himself and the FBI, he sent that letter to Congress, not thinking they would leak it. That’s why it only took a couple days to re’close the investigation.