Your Complete Guide to Mexico’s 2018 Elections

Mexico heads to the polls Sunday in national elections that will likely mark a sharp change in the political direction of Latin America's second largest economy. It comes at a time of disillusionment for many: incumbent President Enrique Peña Nieto is deeply unpopular, as is his rightwing Institutional Revolutionary Party (PRI), which has ruled Mexico for 77 of the last 90 years.