A top adviser on Hispanic issues to John McCain’s presidential campaign said Sunday that a joint interview with McCain and Sarah Palin planned for Univision last fall had to be canceled because Palin was unprepared to discuss Latin America policy. “She did not feel comfortable speaking about issues regarding Hispanics and Latin America,” GOP consultant Ana Navarro told Univision anchor Jorge Ramos in an interview. “Those are not topics that come up frequently in Alaska. So she asked to cancel the interview and, unfortunately, you were already there.”