Not enough to overcome the margin of fraud.
Agreed. Also, the news media is doing a fine job of keeping everyone ILL-informed by helping to cover-up the numerous scandals.
Doesn't matter. Margin of error has become Margin of we have no idea how polls are working these days. Polls are even more useless than they ever were except as a marketing tool for media organizations. Ignore them. The modeling analysis done by Nate Silver is probably as good as you are going to find, but the deciding factor is going to be turnout. Turnout will outweigh margin of error, voter fraud and all of the other variables. Who can get their voters to the polls will win.