The man at the microphone spoke in a language most Republican presidential primary voters do not understand. "You are part of the new wave of hope for this country," Jeb Bush said in fluent Spanish to the National Hispanic Christian Leadership Conference this week. Switching to English, he said the U.S. needs immigrants for the country "to become young and dynamic again." It doesn't seem to matter that Hispanic voters typically do not have much say in Republican primaries. The former Florida governor's play to Hispanic values and policy goals has begun to shape his young political operation. Well before...