It means that someone releases the info that HC used a private email server but makes it sound as if it were Treasonous, rather than something many in her position did previously.
It releases email information that suggests HC had views on subjects that some people might not like, perhaps 'Choice' and the death penalty or that she dislikes this person or that person.
It means stories like HC and someone else ran a Child P0rn ring out of a Pizza joint in DC.
Sufficient and continuous 'Fake News' can and does affect people, it increases confirmation bias and increases the likelihood of waverers moving to a given side.
It has taken a long time, with many still disputing the facts, for most of the (US) public to 'know' that Obama was born in the USA and is also not a Muslim.
And, since DT was in at the start (or started) that disgusting lie (the lie itself, not being non-American or a Muslim of course) - it says a great deal about the person without all the additional and ample evidence that he is not fit for office.
The simple fact is that it took only a small amount of swing in a small number of places to make the difference in the outcome.
It is like someone complaining of losing a race right at the end because the opponent (or a supporter) bumped them just near the line... "You cheated, not fair", "You lost, stop complaining". In this case, James Comey must take a significant amount of the blame - the irony is incredible given the current situation.
If only, like an Olympic medal, the Presidency could be taken and given to the next runner-up when malfeasance was detected and subsequently confirmed.
We can only hope that the system makes the maximum correction possible, despite the fact that a lunatic would be replaced by a nutcase.
In the meantime, we will enjoy the comedy and the fact that he hates his new life, because he didn't want it in the first place.
But then, I am not an American so I don't feel the abject shame that I would if I were.