Here's the link to the Resurgent Republic infographic about Hispanic voters getting so much attention today.
It's a close study of a population of more than 50 million people. Not all those 50 million are (or will ever be) eligible to vote: as the infographic does not make clear, about 80% of the 11-12 million illegal population are Hispanic too.
Still: even the legal population amount to a big and growing group—and a large and daunting challenge for Republicans.