But unilateral U.S. military strikes will have little long-term effect, because the labs and cartel commanders that get taken out are easily replaced, she said.
David McCormick, Republican in Pennsylvania Senate race, backs using military to fight fentanyl
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Felbab-Brown said the violence spurred by Mexican cartels is threatening countries previously considered peaceful.
In Ecuador, the global reach of Mexico's warring drug cartels fuels a national crisis
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