Are Republicans losing white voters too?

Supporters of GOP presidential candidate Ben Carson cheer during a campaign rally at the Anaheim Convention Center. (Kevork Djansezian / Getty Images)Many Republican tears have been shed over the party's inability to win over Latino voters in California. And many more have been shed over the party's inability to win over the state's Asian voters, at least in big ticket races. And now there's another, more surprising reason for Republicans to fret.

Are they losing white voters too?

Nationally, as well as in California, white voters — specifically, older white voters — have been the backbone of the Republican Party. That worked, as long as older white voters were the backbone of the state's…