When the Institutional Revolutionary Party (PRI) lost the presidency in 2000, most political analysts believed that the defeat sounded the death knell for the party that had ruled for 71 uninterrupted years.
Less than a decade later, the PRI is once again the biggest force in national politics. In July, it cleaned up in the mid-term elections for the lower house of Congress, winning 237 of 500 seats. The result more than doubled its previous number of 106.
