IOWA FALLS, Iowa – People born in Iowa Falls live and die here. Strangers are rare. In this town of 5,000, fewer than 50 were born outside the U.S. Last year’s census showed that 97 percent of the residents described themselves as “white.” Yet, to many here, immigration was the top issue in the presidential race. To them, it’s about fairness and jobs. “They have entered the U.S. illegally, but they are here, reaping the benefits,” said Linsley Baldwin, a Republican who wanted tighter border control and deportation of undocumented workers. “I don’t think amnesty is the answer. They’re earning...