A Serious Immigration Debate, Thanks to Donald Trump

Two months ago, in the first speech of his Presidential campaign, Donald Trump departed from his prepared text in order to speak--vehemently and apparently extemporaneously--about the issues that concerned him most. One of the first was immigration, and he suggested, somewhat paradoxically, that unauthorized immigrants from Mexico were out-competing American workers ("They are beating us, economically") and also undermining American society. "When Mexico sends its people, they're not sending the...