IMO Comey disqualified himself from the inevitable follow on investigation
At the very beginning of the hearing Chaffetz asked Comey why he didn't look into HRC lies during her testimony. Comey responded that he did not have a request from congress. I am sure one is being drafted now.
Here is the issue, other than I can't think of a time HRC perjured herself, by making his statements on Tuesday, which are unprecedented, Comey offered his opinions. Some of his "facts" are questionable, and others seem to have been proven to be false.
So, regardless of his intent, there will be legitimate questions regarding his ability to assess the situation without his proven bias. Remember, three emails contained confidential info, but were not properly marked, or potentially did not meet the confidentiality requirements. Thus he directed a review of over 30k emails utilizing three man years of time and came up with nothing, yet still commented on what he thought of HRCs actions.
Also, I was shocked when he said he was not aware of classifications changing after the fact. Really, how could he spend a career working for the govt and not know that?