Lopez Beltran, son of Mexican leftist leader Lopez Obrador, speaks during a news conference at Medica...
Andres Manuel Lopez Beltran (2nd L), son of Mexican leftist leader Andres Manuel Lopez Obrador, speaks during a news conference at Medica Sur hospital in Mexico City December 3, 2013. Lopez Obrador, runner-up to President Enrique Pena Nieto in last year's election, suffered a heart attack early on Tuesday and was admitted to hospital, but is improving, doctors said. From L-R: Lopez Obrador's spokesman Cesar Yanez, Lopez Beltran and cardiologists Patricio Ortiz and Octavio Gutierrez. REUTERS/Tomas Bravo (MEXICO - Tags: POLITICS HEALTH)