It's hard to listen to Comey's self righteous bull ****, but to summarize a couple things:
James Comey ‘Mildly Nauseous’ Over Idea He Swayed the Election Given what Trump has turned out to be, I'll bet Comey is more than mildly nauseous. Given how he rationalized his decisions, I imagine he tells himself over and over, he had no choice, even though he obviously did.
He has no *********** excuse for why he made stuff public about Clinton while withholding what he knew about Trump.
On the topic of the emails, as Feinstein pointed out, he operated under the assumption he was going to find some malicious intent in the emails they had yet to uncover, even though they had found no such thing in the thousands of emails they had reviewed, and, lo and behold they did not find any evidence of malicious intent in the new emails uncovered on Weiner's computer. IOW, Comey assumed Clinton was guilty from the beginning and continued to assume she was guilty even when he couldn't find anything supporting that assumption of guilt. He sent his last minute letter because he assumed he would find something. He found nothing..