The last few days have offered a tit-for-tat spat between PAN and PRI functionaries over who is to blame for the insecurity today. PAN chief Germán Martínez said Mexico is being rattled today because past PRI presidents dropped the ball; PRI Senator Jesus Murillo responded that such was stupidity; Interior Secretary Fernando Gómez Mont reaffirmed Martínez's comments, and threw a little leftover blame Vicente Fox's direction for good measure.
I'm not sure quite what PRI officials have to gain by defending their past presidents, none of whom hold public office and all of whom are widely (and correctly) considered to have been ineffective in combating the growth of Mexican drug gangs. They'd do better to simply focus on today. Similarly, I'm not sure what Calderón and co. think blaming the others does for them. It's a matter of fact that drug violence has reached unprecedented levels under his administration, so indirectly encouraging comparisons between today and, say, the halcyon days of Miguel de la Madrid is unhelpful. Aside from that, it's irrelevant. I don't think Mexicans much care who is to blame --they are mostly content fingering anyone powerful-- they just want it to get better.