Emails are not going to deter any democrat from voting for Clinton nor will Benghazi, especially when you consider the alternative is an ill-equipped stranger to the world of politics and diplomacy. If Clinton is losing Democrats, it's nowhere's near the vast number of Republicans and Party Leaders that have bailed on Trump. I don't know where you guys get your info, but it is definitely flawed.
The New York Times shows Clinton has a 90% chance of victory. If Trump would verbalize realistic plans for the economy, immigration, and foreign policy he might have a chance, but to date he continues to only tell us what's wrong and who's to blame. The man not only needs to stay on message, he needs a message Americans can buy into. Right now it's just gibberish.