According to conservative pundits, this wasn't supposed to happen. Well, too bad for those pundits and too bad for the GOP. Perhaps there is no surer way of increasing the vote of a group than trying to suppress it or vilify it. This is just desserts for those who passed voter ID laws or tried to change voting schedules to disadvantage Dem voting blocs.
The changes in demographics is the major issue conservatives will have to grapple with if they want electoral success in the Senate and the presidency (that is, beyond Congressional districts subject to gerrymandering). As I wrote earlier, some conservatives are doing a better job than others to start this work.
I actually wish them well because competition creates improvement in many areas, including political ideas. A Democratic party that can count on a huge proportion of minority votes is likely to be a corrupt or hackish party.
Here are some sources for demographic data: CNN, WaPo, and FoxNews.
Extras. Is Fox News already trying to nudge conservatives into acceptance and strategic engagement with the new demographics? Beautiful graphical representations of demographics and electoral choices from the NYT. Brief, pointed discussion of demographics and get-out-the-vote in Ohio.