MEXICO CITY – Iran is exploring ways to expand anemic trade with Mexico as part of stepped up efforts to deepen ties with Latin America, a top Iranian diplomat said Thursday. Annual trade between Mexico and Iran is a mere $50 million, compared to $2 billion with Brazil, said Ali Reza Salari, Iran's deputy foreign minister for the Americas. "We are here to investigate, why so low?" Reza Salari told reporters in Mexico City, where he was to meet with diplomats and business leaders. "With Mexico, there is absolutely no political problem between us. No cultural problems. It shows we...