She may have been a poor candidate with a lot of baggage but she would have eked out a win if not for Comey. Trump was in self-destruct mode until that gave him oxygen. Clinton did not lose by much. She was 20 points ahead before Comey - not 3 or 4. I think a lot of people said 'the hell with it' and came in for Trump at the last minute because of all the Clinton negativity and Trump's reinvigorated campaign in the last week.
Sorry but I just don't agree with you take on why Clinton lost.
First as Cid pointed out polling data was flawed because Trump supporters didn't 'play along' with the pollsters and \ or the pollsters sample groups didn't represent the make up of those that acutally ended up voting.
Second: Low voter turnout by those that voted for Obama in 2008 and\or 2012; I find it hard to believe that Comey letter had any significant impact on this group and was a leading indicator as to why they decided to NOT vote.
Third: Voters that were NOT pro Trump or Clinton, but ended up voting for Trump: As Clinton herself said, most voters had made up their mind prior to the letter as it relates to if the e-mails impacted their view of Clinton or NOT. In addition if these voters were aware of the letter, and planning on voting for Clinton before the letter and it influenced them to NOT vote for her, they would have also been aware of the Comey statement that it was much ado about nothing, and this would have likely moved them back to voting for Clinton.
Yes, it is very possible that: ",,,a lot of people said 'the hell with it' and came in for Trump at the last minute because of all the Clinton negativity and Trump's reinvigorated campaign in the last week".
But there was a lot of Clinton negativity way prior to that letter (even by the so called liberal media as well as by Sanders due to the behavior of the DNC and all the money she got from the 1%).
I'm not saying the letter wasn't a factor at all but I would rate it low on the list of reasons why Clinton lost.