http://fivethirtyeight.com/features/...-white-voters/
Overall the Trump strategy has been to gain white voters to make up for the loss of minority voters which to me seems a silly way to go as one heads towards the future with more and more minority voters. But that's the current state of affairs for the GOP.
Problem is other than non-college degree male white folk, he has been losing votes compared to Romney. Overall Romney ended up with a 17 point lead on Obama for white voters. Trump has fallen to 13 points but given the changing demographics he would need about a 22 point lead to match Romney's performance.