Why are opposition parties going along with a pact that benefits their arch-enemy?
The pact, launched the day after Mr Peña took office on December 1st, secures cross-party backing for a package of long-overdue reforms. It has already made possible an overhaul of education and a law to tackle monopolies in telephony and broadcasting. But the alliance is under strain. In the run-up to local elections held in almost half the states on July 7th, the PAN and the leftist Party of the Democratic Revolution (PRD) threatened to pull out of the pact, demanding that the government stop local PRI bosses from using electoral dirty tricks honed during its seven decades in power in the 20th century.