… One big reason Trump is trailing — by an average of 4 to 6 percentage points, depending on which aggregator you use — is because, despite all the bluster, he isn’t doing any better than Romney did among white voters. … To win, Trump would need to improve on Romney’s margin by a minimum of 5 percentage points if the electorate looked exactly the same as it did in 2012 and every other racial group voted in the same manner as it did in 2012. CONT.
Harry Enten, FiveThirtyEight