I could also wonder if a something wasn't being drafted in the event that an indictment would be recommended. It's been known that candidates for office will have both an acceptance speech and a concession speech in the can so that their will be no need for a hurried speech writing session that would come out as being awkward. These folks know what the media does with how such things are worded. I get the feeling Comey was a meticulous enough person to understand that whatever statements he made were going to be subject to dissection and analysis by persons looking for hidden treasure.
perhaps JP thinks Trump should pardon him, too?
http://nation.foxnews.com/2017/09/01/comeys-alleged-clinton-exoneration-statement-casts-doubt-senate-testimony

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