Mexico's Lopez Obrador Is Not Going Quietly

Manuel López Obrador has filled the streets of Mexico City with tens of thousands of political supporters. Now he’s threatening to use them to force a new presidential election. What are the chances of violent conflict? What are the possible consequences for the United States? Plus, more violence as Iraqis try to take charge of their security forces, and a political surprise that could be historic: former President Jimmy Carter may meet with the former President of Iran.