Mexican drug cartels are exploiting this loophole . Townsend , Helmke : U.S. guns are helping fuel the Mexican drug war . They say U.S. should close loophole letting guns be sold without background check . They say Congress should drop limits on federal release of firearms data . Townsend , Helmke : U.S. should expand powers of federal firearms agency .
Townsend , Helmke : U.S. guns are helping fuel the Mexican drug war . They say U.S. should close loophole letting guns be sold without background check . They say Congress should drop limits on federal release of firearms data . Townsend , Helmke : U.S. should expand powers of federal firearms agency .