Donald Trump won New Hampshire, a moderate Northeastern state that prides itself on its sober analysis of the candidates at hand. Donald Trump won South Carolina, a conservative Southern state with a number of religious voters. Donald Trump has now won Nevada, a Western state with its own eclectic mix of Republican voting groups. Trump won them all. According to preliminary entrance poll data reported by CNN, he won every age group and every education group and both genders -- and even every racial and ethnic group. About 1 in 10 Nevada Republicans were Hispanic. More than 4 in 10...