Until the Republican Party stops actions like voter suppression, opposing contraception being covered by insurance, opposing immigration reform, opposing equal pay for women and many other positions that drive away their former coalition they will continue to be an old, white, mostly southern and rural party.
They can't just nominate a woman or a minority and say, "See, we aren't against you."
It's not about Hillary or whomever the Dems nominate. As I've been posting, it's about the numbers. When you are losing 90-97% of the black vote, over 65% of the Hispanic vote, a similar percentage of the Asian vote and losing women, you can't win the WH. It's strictly about numbers.