How did the loss of power of the PRI increase the power of drug trafficking operations in Mexico?

I'm trying to make the connection between loss of PRI power and increase in drug trafficking operations power. Did changes in leadership upset arrangements drug traffickers had made with previous government officials? Did the uncertainties of the political transition create space for organized criminal groups... show more I'm trying to make the connection between loss of PRI power and increase in drug trafficking operations power. Did changes in leadership upset arrangements drug traffickers had made with previous government officials? Did the uncertainties of the political transition create space for organized criminal groups to expand?
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