LAS VEGAS — Ron Paul dropped his standard stump speech on Wednesday and aggressively courted Latino voters. At a senior center in East Las Vegas, the Texas congressman told about 100 Hispanics that they have been unfairly made “scapegoats” for the country’s economic troubles. He said it’s “part of human nature” for newcomers to be shunned, but that prejudice toward outsiders worsens when unemployment is high. He said that illegal immigrants were being scapegoated in a manner similar to Jews in Nazi Germany because of tough economic times. “When things go badly, individuals look for scapegoats,” he said. “I just...