Is Trump’s huge win in Arizona tonight because of counties on the Mexican border? Not necessarily. He’s doing well in border countries, but not any better or worse than elsewhere in the state. So far, Trump has 43 percent of the vote in highly populous Pima County (which contains Tucson), 49 percent in Yuma County, 45 percent in Santa Cruz County, and 49 percent in Cochise County. All those results are pretty similar to the 46 percent of the vote he has statewide.
