Important point about why Comey had to send this letter, and why today.
Comey testified under oath to Congress that the investigation was "complete". The letter is an amendment to that statement. And as that was under oath, he could theoretically be under some legal jeopardy if he did not issue timely notification that his testimony had to be modified.
That could tell us that there's less here than we think, but it seems this letter is purely for Comey to covering himself with Congress.
Thats fine, but his letter was vague and poorly worded.
A few more details in the letter and this would have been a much smaller thing.
He knew what he was doing.
