Well, what makes one think the Republican party is the "white party"?
I'd like to speak to that. For all the talk from the Democrats on race, did they ever once develop a "farm team" of credible minority candidates for national office? I think that's what they may have been trying to do when they gave Obama the keynote in 2004, but he jumped ahead of the timetable and ran in 2008 with no discernible accomplishments.
It worked for them this time, but who do they have in the pipeline? The only names I can think of are Julian Castro and Cory Booker, but they're just mayors. No one is going from city hall to the White House. They have no minority farm team.
Meanwhile, the GOP, thanks in large part to the supposedly racist tea party, has politicians like Rubio, Cruz, Susannah Martinez, Bobby Jindal, and Nikki Haley all making names for themselves. The Republican Party is looking strong for the future, not so much with the democrats.