http://thinkprogress.org/politics/2016/03/03/3756127/donald-trump-destroy-outreach-republicans-warn/
"Republican presidential candidates may need anywhere between 42 and 47 percent of the Latino vote, especially in key battleground states like Virginia, Ohio, New Mexico, Florida, Nevada, and Colorado, the polling group Latino Decisions found. The party won less than 30 percent in 2012."
