By Tracy Wilkinson / Los Angeles Times

When a president is in crisis, it is usually a propitious time for political opponents to pounce. But in Mexico, the controversies, failings and crisis of confidence engulfing President Enrique Peña Nieto have tarred not just his 2-year-old administration but the entire political establishment.

And no political realm has suffered more than the left, some of whose politicians have been exposed as corrupt and in cahoots with drug traffickers.

http://www.latimes.com/world/mexico-americas/la-fg-mexico-left-20141227-story.html