Changing Course on Narcotrafficking

I missed this note yesterday over at Mexico Today:

And in an a major announcement, President Felipe Calderón said he is backtracking in his use of the armed forces in the fight against narcotics trafficking.

The president announced a change of strategy and that army troops would gradually be pulled out of the battle against drug trafficking as bad officers are cleared out of police corporations.

Wow. That is, to my reckoning, a 180 degree turnabout in the war on narcotrafficking. Why?

More thoughts on this later.