I did find a couple of polls (Rasmussen, TIPP, LA Times) that put Trump in a dead heat to slightly ahead of Clinton. If those are to believed I think it will be a resounding win for Trump and here's why. When all of the pollsters ask undecideds who they will vote for if they have to decide right now, they decide overwhelmingly in favor of Trump. I think they make up about 5-7% of the voting population, and if he wins those votes, say, 2-1 against Clinton, he'll pick up a percent or two when the election actually goes through. It's also of note that Gary Johnson gets a significant number of those votes, which may be pulling votes from Clinton due to his very socially liberal stance on most issues.