It also said Mexico `` expects that National Guard personnel will strengthen U.S. operations in the fight against transnational organized crime that operates on both sides of our common border and that it will not , in accordance to its legal obligations , conduct activities directly linked to the enforcement of immigration laws . '' NEW : Mexico says additional U.S. troops at border should battle organized crime , not illegal immigration . Obama to send 200 more National Guard troops to help with anti - drug and intelligence efforts . ` ` It 's simply not enough , '' Sen. John McCain says . Previous border war that sent more than 200 troops to the region was in 2008 .
NEW : Mexico says additional U.S. troops at border should battle organized crime , not illegal immigration . Obama to send 200 more National Guard troops to help with anti - drug and intelligence efforts . ` ` It 's simply not enough , '' Sen. John McCain says . Previous border war that sent more than 200 troops to the region was in 2008 .