The Obama administration announced a crackdown on border violence and on the smuggling of cash and weapons into Mexico on Tuesday , a step that could mark an end to a nasty blame game over where responsibility for the violence lies . NEW : Clinton says fighting does not pose major threat to U.S. security -- yet . Mexico 's U.S. ambassador says not to share an ` ` - sign '' ` ` Our insatiable demand for illegal drugs fuels the drug trade , '' Clinton says in Mexico . U.S. wants to stop flow of guns , body armor , night - vision goggles to cartels , she says .
NEW : Clinton says fighting does not pose major threat to U.S. security -- yet . Mexico 's U.S. ambassador says not to share an ` ` - sign '' ` ` Our insatiable demand for illegal drugs fuels the drug trade , '' Clinton says in Mexico . U.S. wants to stop flow of guns , body armor , night - vision goggles to cartels , she says .