Just to go back to the comment about how Comey is the reason that Trump won...
Aaaaaaages back - literally one the first threads here - gave a detailed explanation about why it was announced when it was announced. I'm tying to dredge my memory but I'm sure it was because the earlier investigation hadn't been completed correctly and so Comey felt obliged to check it himself. Not because he felt there was wrongdoing but because, as others have mentioned, he wanted to do the right thing.
Argh.. I'm going to have to try and find the link now 