The polls are consistently showing that Clinton is only losing the white vote by about 10-15 points. So then why are the polls so close? If there is a 5-10 point swing towards Clinton from Obama 2012 among the white vote, shouldn't she be leading by about 10 points right now? What exactly is going on?
Obama lost the white vote by 20 points and still won by 4 nationally 2012. You are also forgetting the high numbers of undecided voters.
Hillary in most polls seems to be getting at least 75% of the combined minority vote (in 2012, Obama won non-whites 80% - 19%) with Trump getting less than 10%, the remainder are undecided. Most polls that I've seen show Trump only getting in the low-50s support from whites (Romney got 59%) and Hillary in the low-40s (Obama got 39%), with the remainder undecided/voting third party.
