In Mexico, case of ex-governor and narcos reads like crime thriller Last week, the former governor of the northern border state of Tamaulipas, Tomas Yarrington, denied allegations that he took money from the Gulf and the Zetas drug cartels and through a spider's web of co-conspirators and bag men bought real estate and built front companies in Texas and Mexico, assets now being sought by U.S. and Mexican law enforcement. "It is false that I took bribes, it is false that I protected criminals, it is false that I laundered money for the narcos," said Yarrington, who is under investigation in Mexico and named in civil proceedings in the United States but has not been charged with any crime. Yarrington was an important leader - and now a symbol - of the Institutional Revolutionary Party, or PRI, whose telegenic standard bearer, Enrique Pena Nieto, is the front-runner in the presidential contest to be decided on July 1. The PRI ruled Mexico for more than 70 years, a one-party, sometimes ruthless autocracy that gave with one hand but took with the other. The question that looms over this election: Does Pena Nieto represent the old PRI, notorious for bureaucratic corruption, crony capitalism and alleged pacts with drug smugglers, or the new PRI, modern, transparent, effective and (relatively) clean? Pena Nieto, a former governor himself, is leading most polls by double digits, ahead of his rivals Josefina Vazquez Mota of the ruling party and Andres Manuel Lopez Obrador of the left, who narrowly lost the 2006 presidential election to Felipe Calderon and maintains it was stolen. Yarrington says he is the victim of the dark arts, a political persecution orchestrated by supporters of Calderon's National Action Party, the PAN, to hurt Pena Nieto and help Vazquez Mota by reminding voters, at this crucial junction, what PRI represents in their eyes. Seeking to limit possible damage, the PRI threw Yarrington out of the party last month. Many here assume it is possible that Yarrington and other top officials in Tamaulipas are being pursued because there is solid evidence of ties to the powerful Gulf Cartel and its former allies, now vicious foes, the Zetas, who post videos of torture sessions, hang women from bridges and dump hundreds of headless victims on the street in spectacular displays of violence. The question we are asking ourselves is: What if both things are true at the same time? That the Tamaulipas government has been controlled by the narcos? And that the Calderon government is using this case, at this point in time, to hurt its rivals?" said Lorenzo Meyer, a political analyst and professor at the Colegio de Mexico.